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Ladd Keith

@laddkeith.com
5.4K followers 370 following 522 posts

Climate planner | Associate Professor & Director, Heat Resilience Initiative, University of Arizona | Helping cities plan for extreme heat 🏜️🏳️‍🌈 laddkeith.com

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Ladd Keith @laddkeith.com · 21h
Just curious, who else is heading to Bangkok for the GHHIN @heathealth.info #GlobalHeatForum?
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Ladd Keith @laddkeith.com · 24/09/2026
A day in the life of a planning professor. 😅 Stay tuned... 🐻⬇️
Ladd Keith posing with a football.
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American Meteorological Society @ametsoc.org · 22/09/2026
The first paper in the U.S. Climate Collection, an AMS-@agu.org initiative supporting assessment-ready climate science, is out! Published in #BulletinAMS & Earth’s Future, the paper highlights key needs for future climate assessments and decision-making. Read more: bit.ly/46CTg30
Graphic for the U.S. Climate Collection: Informing Climate Assessment in the United States announcement.
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Jesse M. Keenan @jessemkeenan.com · 22/09/2026
I'm honored to contribute to this commentary w/ colleagues from across the United States. Big thank you to Melissa Kenney @costasamaras.com @bobkopp.net for their leadership & public service in the advancement of climate scholarship. READ HERE --> agupubs.onlinelibrary.wiley.com/doi/10.1029/...
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Bob Kopp @bobkopp.net · 22/09/2026
NEW PAPER: In a new paper, jointly published in @agu.org Earth's Future & @ametsoc.org BAMS, and co-led by Melissa Kenney, @costasamaras.com and me, 175 authors outline priorities to guide the future of scientific assessments of climate change in the United States. 🧵
doi.org
Research Priorities for Robust Climate Assessments in the United States
A network of climate assessments plays a critical role in synthesizing the state of science to support evidence-based decision-making To support future U.S. and sub-national climate assessments, ...
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Ladd Keith @laddkeith.com · 22/09/2026
Remember the Sixth National Climate Assessment (#NCA6)? In April 2025, all of its authors were released, and the report was halted. I was a Southwest chapter author. Many of us former NCA6 authors just published what we could in its place. doi.org/10.1029/2025...
doi.org
Research Priorities for Robust Climate Assessments in the United States
A network of climate assessments plays a critical role in synthesizing the state of science to support evidence-based decision-making To support future U.S. and sub-national climate assessments, ...
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Ladd Keith @laddkeith.com · 19/09/2026
I had the opportunity to be the closing speaker at the inaugural #PalmSprings Heat Summit this afternoon and share our research and resources for addressing extreme heat. I'm looking forward to see where their efforts take them next and to support them how I can! #extremeheat #heatresilience
Ladd Keith speaking at the Palm Springs Heat Summit
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Ladd Keith @laddkeith.com · 15/09/2026
AI apocalypse aside, I just got my first AI agent email for an interview on extreme heat... I'm willing to bet these will overrun professor inboxes in short order. 🤖✉️
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Ladd Keith @laddkeith.com · 11/09/2026
"The National Oceanic and Atmospheric Administration this week announced that for the Lower 48 states, this summer– from June to August– was the warmest in 132 years of record-keeping." www.npr.org/2026/09/10/n... #climatechange #extremeheat
npr.org
This summer was hot. August shattered global heat records
Scientists say that August was the hottest month ever recorded globally. In the U.S., summer temperatures also shattered heat records.
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Ladd Keith @laddkeith.com · 04/09/2026
Cities are adopting heat action plans faster than ever. We still have almost no evidence that they work. In our new report, we coded 34 plans, evaluated 12 in depth, and interviewed officials. We found that cities track activities, not outcomes. heatshed.substack.com/p/we-dont-kn... #heatactionplan
heatshed.substack.com
We don't know if heat action plans are working
A new international evaluation finds that cities track what they did, not what they changed.
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PLOS Climate @plosclimate.org · 01/09/2026
New research by Ashley Avila, Nicole Iroz-Elardo, Kristina Currans and @laddkeith.com: "A pilot study exploring the effect of vehicular waste heat on personal heat exposure in a semi-arid environment" journals.plos.org/climate/arti...
journals.plos.org
A pilot study exploring the effect of vehicular waste heat on personal heat exposure in a semi-arid environment
Understanding the causes of heat in various microclimates in cities is vital to improving human thermal comfort and health in outdoor spaces. This pilot study uses an experimental design to evaluate m...
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Ladd Keith @laddkeith.com · 24/08/2026
"Just thinking in your own community, how many dedicated professionals do you have to extreme heat? Probably none." Check out my LinkedIn Live panel on Heat & Health: Co-Creating Resilience with Children & Communities hosted by ChildFund www.linkedin.com/eve... #extremeheat #heatresilience
LinkedIn Live Panel Flyer
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Ladd Keith @laddkeith.com · 05/08/2026
📬 ICYMI: I started a newsletter. It's called Heatshed, and it's about how we plan for and govern extreme heat. I've written for journals and op-ed pages for years. This is where I get to think in public at the speed the problem moves. #extremeheat #heatshed #heatplanning #heatgovernance
Heatsheds cross city, regional, and state boundaries. (Source: NASA Earth Observatory)
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Ladd Keith @laddkeith.com · 21/08/2026
New interview with KVOA on how @uarizona.bsky.social kept students and their parents safe on move in day this week. www.kvoa.com/news/local/u... #extremeheat #universityofarizona #beardown
kvoa.com
U of A move-in 2026: Heat can't stop excitement for new Wildcats
TUCSON, Ariz. (KVOA) - The University of Arizona welcomed nearly 1,500 students on one of the hottest move-in days in the school's history.
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Brent Toderian @brenttoderian.bsky.social · 16/08/2026
I’ve created a handful of them, but this might still be my most unusual STARTER PACK! A team-up with world famous climate scientist @katharinehayhoe.com, these are folks connecting the dots on climate action via better cities! Please follow these great folks and share the pack! go.bsky.app/7Wh2uvp
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Ladd Keith @laddkeith.com · 14/08/2026
Good to see a second state follow Arizona's lead with a state-level chief heat officer position! www.wbur.org/news/20... #extremeheat #heatresilience
wbur.org
Mass. is second state to appoint heat resilience officer
Massachusetts just appointed a heat resiliency officer to coordinate with state government agencies and work with communities to "prepare for rising temperatures, protect public health and reduce the impacts of extreme heat."
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Ladd Keith @laddkeith.com · 08/08/2026
“Climate change will manifest as a series of disasters viewed through phones with footage that gets closer and closer to where you live until you're the one filming it.” ... and the Catalinas behind me are on fire again from dry lightning. Photo in nighttime mode. #azwx #tucson #wildfire
Catalina Mountains on fire from dry lightning.
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Ladd Keith @laddkeith.com · 07/08/2026
Over the years, @sarameerow.bsky.social and I have evaluated many plans to see how well they address extreme heat. In this Global Disaster Preparedness Center project, we explored how heat action plans are actually being implemented and asked officials about their perceived effectiveness.
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Ladd Keith @laddkeith.com · 05/08/2026
📬 ICYMI: I started a newsletter. It's called Heatshed, and it's about how we plan for and govern extreme heat. I've written for journals and op-ed pages for years. This is where I get to think in public at the speed the problem moves. #extremeheat #heatshed #heatplanning #heatgovernance
Heatsheds cross city, regional, and state boundaries. (Source: NASA Earth Observatory)
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Ladd Keith @laddkeith.com · 02/08/2026
📬 Wrote a new post for my Heatshed newsletter on air conditioning in Europe and the U.S. and lessons we can learn from each other. I'll post monthly after this, but I had been mulling this one over all summer! heatshed.substack.com/p/air-condit... #airconditioning #extremeheat #heatwave
heatshed.substack.com
Air conditioning is not a guarantee for heat protection
What Europe and the United States can learn from each other after this summer's heatwaves.
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Ladd Keith @laddkeith.com · 30/07/2026
I started a Substack on heat planning and governance! "The causes of extreme heat exceed political boundaries, and the solutions to address it must span sectors and levels of government." Read more and subscribe at heatshed.substack.com/p/what-is-a-... #extremeheat #heatshed
heatshed.substack.com
What is a "heatshed"?
What a heatshed is, where the term came from, and what this newsletter will be
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Ladd Keith @laddkeith.com · 28/07/2026
🎙️ICYMI: I joined Doug Parsons on the latest episode of the @americaadapts.bsky.social podcast, where we discuss the latest developments in adapting to extreme heat. www.americaadapts.org/episodes/ext... #extremeheat #heatresilience #climateadaptation #climatechange
americaadapts.org
Extreme Heat: The Deadliest Climate Hazard Is Also the Most Invisible with Dr. Ladd Keith — AMERICA ADAPTS The Climate Change Podcast
Extreme Heat: The Deadliest Climate Hazard Is Also the Most Invisible with Dr. Ladd Keith. Ep. 257.
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Ladd Keith @laddkeith.com · 27/07/2026
"‘Extraordinarily hot’: US heatwave stretches on with millions still under warnings" www.theguardian.com/... #extremeheat #heatwave
theguardian.com
‘Extraordinarily hot’: US heatwave stretches on with millions still under warnings
Southern and central states from California to Mississippi face heat indexes above 100F amid another heat dome
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Ladd Keith @laddkeith.com · 24/07/2026
"Japan this week recorded its first kokushobi, a term that means “cruel heat day,” as temperatures reached 104 degrees. It is not the only country that has scrambled for a new summer vocabulary." www.nytimes.com/2026/07/23/w...
nytimes.com
It’s So Hot That Japan Needs a New Word for It
Japan this week recorded its first kokushobi, a term that means “cruel heat day,” as temperatures reached 104 degrees. It is not the only country that has scrambled for a new summer vocabulary.
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Ladd Keith @laddkeith.com · 24/07/2026
I recently spoke with the Arizona Farm Bureau about rural heat resilience: “Cities have advanced cooling centers, cool pavement and urban greening. But those might not be best strategies for rural farming communities.” www.azfb.org/Article/What... #heatresilience #ruralheat #extremeheat
azfb.org
What Science Tells Us About Working in Arizona’s Heat
As the push for regulation intensifies, it’s important to understand what we know — and don’t — about farm and ranch work in extreme heat.
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Ladd Keith @laddkeith.com · 23/07/2026
I joined NPR affiliate @wosupublicmedia.bsky.social All Sides with Amy Juravich this morning to discuss extreme heat and heat resilience - timely, as Ohio experienced a record-breaking heatwave last month. Catch the full live interview at www.wosu.org/show/all-sid... #extremeheat #heatresilience
wosu.org
Learning heat resilience during extreme temperatures
The dog days of summer are upon us. There are ways communities can deal with extreme heat, but it takes a systemic approach. We take a look at heat resilience and what it takes to build heat-resilient...
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UofA Heat Resilience Initiative @heatresilience.bsky.social · 23/07/2026
Our July newsletter is now available featuring rural heat planning, heat resilience news coverage, and important upcoming events. Subscribe to the newsletter by visiting heat.arizona.edu. ☀️ #extremeheat #heatresilience Read it now, here: view.comms.arizona.edu?vawpToken=IQ...
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Ladd Keith @laddkeith.com · 22/07/2026
New in-depth Q&A with Smart Cities Dive: "Our cities were built for a climate that no longer exists." www.smartcitiesdive.com/news/extreme... #extremeheat #heatresilience #heatgovernance
smartcitiesdive.com
3 steps on extreme heat every city should take
Better governance, stronger partnerships and a solid action plan are key to protecting residents from soaring temperatures, this heat resilience expert says.
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Ladd Keith @laddkeith.com · 21/07/2026
🎙️Check out the latest episode of the @americaadapts.bsky.social podcast, where Doug and I discuss the latest developments in adapting to extreme heat! #extremeheat #climateadaptation #climatechange #heatresilience
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Ladd Keith @laddkeith.com · 20/07/2026
📢 Heat impacts all communities, not just large cities. In our new American Planning Association PAS Memo, we explain the need for rural heat resilience and outline actionable principles and strategies for rural communities and small towns. www.planning.org/pub... #extremeheat #heatresilience
Planning for Rural Heat Resilience
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Ladd Keith @laddkeith.com · 20/07/2026
Quoted in this BBC News piece about lessons from Arizona in addressing extreme heat: "It's incredibly important to make someone responsible for heat because the problem is, if it's no one's responsibility, then no one will address it." www.bbc.com/news/art... #extremeheat #climatechange
bbc.com
What Phoenix can teach the world about tackling heat deaths
Maricopa County in Arizona has some of the hottest temperatures, but it has reduced the number of heat-related deaths.
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Ladd Keith @laddkeith.com · 16/07/2026
As a three-time University of Arizona graduate, I am honored to be featured in the latest issue of the Arizona Alumni magazine. alumni.arizona.edu/a... #universityofarizona #beardown #heatresilience #extremeheat #urbanplanning
alumni.arizona.edu
Tucson Grown
Research by heat expert and College of Architecture, Planning and Landscape Architecture Professor Ladd Keith is shaping climate solutions worldwide.
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Ladd Keith @laddkeith.com · 10/07/2026
New interview with News 3 Las Vegas (NBC affiliate) on heat resilience lessons from Arizona that could work in Nevada. news3lv.com/news/loc... #extremeheat #heatresilience
news3lv.com
Arizona tackling heat mitigation, could their efforts translate to Nevada
Reno and Las Vegas are the two fastest-warming cities in the entire country.Tonight we take a look at what neighboring Arizona is doing to address similar heat
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Ladd Keith @laddkeith.com · 08/07/2026
Check out this @udallcenter.bsky.social interview with Minwoo Ahn on our student-led heat resilience learning games - Thermopolis and Heatlandia! udallcenter.arizona.... #extremeheat #heatresilience #games
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Ladd Keith @laddkeith.com · 04/07/2026
"Temperatures are expected to reach as high as 102F (39C) in Washington DC today, with heat index values hitting between 110 and 115F (43-46C)." www.theguardian.com/... #extremeheat #climatechange #4thofjuly
theguardian.com
Washington DC’s Fourth of July parade canceled due to soaring temperature
National Weather Service issued an extreme heat warning as high temperatures have paralyzed the east coast
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Ladd Keith @laddkeith.com · 30/06/2026
Given the recent attention to the European heatwave, I wanted to reshare our Nature comment (2021), where we defined and called for heat governance to address rapidly rising temperatures. Sara Meerow V. Kelly Turner doi.org/10.1038/d415... #extremeheat #heatgovernance
doi.org
Deploy heat officers, policies and metrics
Nature - Cities need heat governance to plan for extreme temperatures and protect those most at risk.
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Ladd Keith @laddkeith.com · 27/06/2026
New interview out with Naveena Sadasivam at Grist: “Cities across the world — even the ones that are doing the best that they can — are still preparing for the heat that we’re experiencing today." grist.org/extreme-we... #extremeheat #climatechange #heatresilience
grist.org
Across Europe, heat adaptation plans are being put to a brutal test
“Cities across the world are still preparing for the heat that we're experiencing today.”
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Ladd Keith @laddkeith.com · 25/06/2026
New Planning magazine article where we draw lessons from the Shade Phoenix Plan for 6 tools to prioritize shade planning, led by Shaylynn Trego, with co-authors David Hondula and Sara Meerow! www.planning.org/pla... #shade #extremeheat #heatresilience #urbanplanning
planning.org
Phoenix’s First-of-its-Kind Plan Shows Shade is More Than Just Trees Now
Six ways planners can combine vegetative and built shade to improve comfort and safety on the ground.
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Ladd Keith @laddkeith.com · 25/06/2026
I joined CNN International primetime to discuss the current heat wave impacting Europe. When asked about the cost to address extreme heat: "To that, I would just say the cost of inaction is even greater." #extremeheat #heatwave #climatechange #heatresilience
Ladd Keith on CNN International
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Ladd Keith @laddkeith.com · 24/06/2026
Check out our June @heatresilience.bsky.social newsletter!
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Abbey @abbeyarletto.bsky.social · 23/06/2026
When reality surpasses fiction! Top: fictional forecast for August 2050, broadcast by French TV in 2014 to warn about the consequences of global warming. Bottom: Real French forecast for yesterday, June 22, 2026.
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Ladd Keith @laddkeith.com · 23/06/2026
When an extreme heat event gets canceled due to extreme heat... (but also, always appropriate to postpone or cancel an event if the safety of attendees is at risk) #extremeheat #heatwave
static.klipy.com
Spider-Man Pointing Meme
ALT: Spider-Man Pointing Meme
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Ladd Keith @laddkeith.com · 23/06/2026
Extreme heat warnings and the hottest temperatures of the summer so far across Arizona this week: 115°F (46.1°C) in Phoenix, 110°F (43.3°C) in Tucson, and 90°F (32°C) in Flagstaff. www.azcentral.com/st... #extremeheat
azcentral.com
Extreme heat warnings expand over Arizona as temperatures climb
Heat risks are spreading across Arizona as a high-pressure system strengthens.
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Ladd Keith @laddkeith.com · 23/06/2026
New interview with National Geographic out: "At the end of the day, extreme heat affects everyone—not just through heat-related deaths and illnesses but quality of life..." www.nationalgeograph... #extremeheat #climatechange #heatresilience
nationalgeographic.com
How cities are fighting back against the 'heat island effect'
As temperatures rise, researchers are rethinking how cities measure and respond to urban heat. But experts say successful solutions require finding solutions tailored to local conditions rather than relying on one-size-fits-all fixes.
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Ladd Keith @laddkeith.com · 22/06/2026
This is what we mean by living in a "heatshed" moment: the climate is warming faster than our response. www.bbc.com/news/article... #extremeheat #climatechange #heatwave #heatresilience
bbc.com
Red heat alerts issued in France, Italy and Spain as 40C temperatures forecast
The heatwave conditions are forecast to intensify in the coming days across central and western Europe.
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Ladd Keith @laddkeith.com · 20/06/2026
An entirely preventable tragedy we continue to see summer after summer: "The hikers died at Grand Canyon National Park in separate episodes as temperatures peaked above 100 degrees, the authorities said." www.nytimes.com/2026/06/20/u... #extremeheat
nytimes.com
3 Hikers Die at Grand Canyon Amid ‘Dangerous’ High Temperatures
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Climate Central @climatecentral.org · 20/06/2026
Today is #ShowYourStripes Day! The warming stripes visualize more than a century of temperature trends. Each stripe represents a year: 🔵 Cooler years 🔴 Hotter years Share custom stripes for U.S. states, cities, & more with #ClimateCentral's new Dashboard: app.climatecentral.org/dataviz/warm...
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Ladd Keith @laddkeith.com · 20/06/2026
Today is #ShowYourStripes day created by @edhawkins.org to show how temperature has changed over time due to #climatechange. Find your stripes at showyourstripes.info
Warming in Tucson, Arizona.
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Ladd Keith @laddkeith.com · 17/06/2026
☀️ ICYMI: Check out my new commentary with @sarameerow.bsky.social, where we argue that "we are living through a 'heatshed' moment, a critical turning point in which heat must be rapidly addressed to protect health and livelihoods worldwide." doi.org/10.1080/0735... #extremeheat #climatechange
Commentary: Our "heatshed" moment is now
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Ed Hawkins @edhawkins.org · 15/06/2026
As is the annual tradition, we hope many of you will take the opportunity to use the Climate Stripes this week to start important conversations about the risks from, and solutions to, climate change. Officially, #ShowYourStripes for 2026 is on Sat 20th June. www.ShowYourStripes.info
Global Climate Stripes
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