Ladd Keith @laddkeith.com · 21hJust curious, who else is heading to Bangkok for the GHHIN @heathealth.info #GlobalHeatForum? 001
Ladd Keith @laddkeith.com · 24/09/2026A day in the life of a planning professor. 😅 Stay tuned... 🐻⬇️ 040
Reposted by Ladd KeithAmerican Meteorological Society @ametsoc.org · 22/09/2026The 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 1128
Reposted by Ladd KeithJesse M. Keenan @jessemkeenan.com · 22/09/2026I'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/... 0194
Reposted by Ladd KeithBob Kopp @bobkopp.net · 22/09/2026NEW 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.orgResearch Priorities for Robust Climate Assessments in the United StatesA 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, ... 114782
Ladd Keith @laddkeith.com · 22/09/2026Remember 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.orgResearch Priorities for Robust Climate Assessments in the United StatesA 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, ... 172
Ladd Keith @laddkeith.com · 19/09/2026I 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 061
Ladd Keith @laddkeith.com · 15/09/2026AI 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. 🤖✉️ 060
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 #extremeheatnpr.orgThis summer was hot. August shattered global heat recordsScientists say that August was the hottest month ever recorded globally. In the U.S., summer temperatures also shattered heat records. 074
Ladd Keith @laddkeith.com · 04/09/2026Cities 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... #heatactionplanheatshed.substack.comWe don't know if heat action plans are workingA new international evaluation finds that cities track what they did, not what they changed. 240
Reposted by Ladd KeithPLOS Climate @plosclimate.org · 01/09/2026New 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.orgA pilot study exploring the effect of vehicular waste heat on personal heat exposure in a semi-arid environmentUnderstanding 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... 041
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 001
Reposted by Ladd KeithLadd 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 152
Ladd Keith @laddkeith.com · 21/08/2026New 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 #beardownkvoa.comU of A move-in 2026: Heat can't stop excitement for new WildcatsTUCSON, Ariz. (KVOA) - The University of Arizona welcomed nearly 1,500 students on one of the hottest move-in days in the school's history. 120
Reposted by Ladd KeithBrent Toderian @brenttoderian.bsky.social · 16/08/2026I’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 1319487
Ladd Keith @laddkeith.com · 14/08/2026Good to see a second state follow Arizona's lead with a state-level chief heat officer position! www.wbur.org/news/20... #extremeheat #heatresiliencewbur.orgMass. is second state to appoint heat resilience officerMassachusetts 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." 040
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 1167
Ladd Keith @laddkeith.com · 07/08/2026Over 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. 110
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 152
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 #heatwaveheatshed.substack.comAir conditioning is not a guarantee for heat protectionWhat Europe and the United States can learn from each other after this summer's heatwaves. 121
Ladd Keith @laddkeith.com · 30/07/2026I 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 #heatshedheatshed.substack.comWhat is a "heatshed"?What a heatshed is, where the term came from, and what this newsletter will be 112
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 #climatechangeamericaadapts.orgExtreme Heat: The Deadliest Climate Hazard Is Also the Most Invisible with Dr. Ladd Keith — AMERICA ADAPTS The Climate Change PodcastExtreme Heat: The Deadliest Climate Hazard Is Also the Most Invisible with Dr. Ladd Keith. Ep. 257. 114
Ladd Keith @laddkeith.com · 27/07/2026"‘Extraordinarily hot’: US heatwave stretches on with millions still under warnings" www.theguardian.com/... #extremeheat #heatwavetheguardian.com‘Extraordinarily hot’: US heatwave stretches on with millions still under warningsSouthern and central states from California to Mississippi face heat indexes above 100F amid another heat dome 020
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.comIt’s So Hot That Japan Needs a New Word for ItJapan 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. 063
Ladd Keith @laddkeith.com · 24/07/2026I 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 #extremeheatazfb.orgWhat Science Tells Us About Working in Arizona’s HeatAs the push for regulation intensifies, it’s important to understand what we know — and don’t — about farm and ranch work in extreme heat. 001
Ladd Keith @laddkeith.com · 23/07/2026I 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 #heatresiliencewosu.orgLearning heat resilience during extreme temperaturesThe 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... 020
Reposted by Ladd KeithUofA Heat Resilience Initiative @heatresilience.bsky.social · 23/07/2026Our 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... 033
Ladd Keith @laddkeith.com · 22/07/2026New 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 #heatgovernancesmartcitiesdive.com3 steps on extreme heat every city should takeBetter governance, stronger partnerships and a solid action plan are key to protecting residents from soaring temperatures, this heat resilience expert says. 110
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 033
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 134
Ladd Keith @laddkeith.com · 20/07/2026Quoted 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 #climatechangebbc.comWhat Phoenix can teach the world about tackling heat deathsMaricopa County in Arizona has some of the hottest temperatures, but it has reduced the number of heat-related deaths. 152
Ladd Keith @laddkeith.com · 16/07/2026As 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 #urbanplanningalumni.arizona.eduTucson GrownResearch by heat expert and College of Architecture, Planning and Landscape Architecture Professor Ladd Keith is shaping climate solutions worldwide. 130
Ladd Keith @laddkeith.com · 10/07/2026New interview with News 3 Las Vegas (NBC affiliate) on heat resilience lessons from Arizona that could work in Nevada. news3lv.com/news/loc... #extremeheat #heatresiliencenews3lv.comArizona tackling heat mitigation, could their efforts translate to NevadaReno 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 041
Ladd Keith @laddkeith.com · 08/07/2026Check 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 040
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 #4thofjulytheguardian.comWashington DC’s Fourth of July parade canceled due to soaring temperatureNational Weather Service issued an extreme heat warning as high temperatures have paralyzed the east coast 070
Ladd Keith @laddkeith.com · 30/06/2026Given 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 #heatgovernancedoi.orgDeploy heat officers, policies and metricsNature - Cities need heat governance to plan for extreme temperatures and protect those most at risk. 220
Ladd Keith @laddkeith.com · 27/06/2026New 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 #heatresiliencegrist.orgAcross 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.” 135
Ladd Keith @laddkeith.com · 25/06/2026New 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 #urbanplanningplanning.orgPhoenix’s First-of-its-Kind Plan Shows Shade is More Than Just Trees NowSix ways planners can combine vegetative and built shade to improve comfort and safety on the ground. 022
Ladd Keith @laddkeith.com · 25/06/2026I 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 020
Reposted by Ladd KeithAbbey @abbeyarletto.bsky.social · 23/06/2026When 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. 236168357553
Ladd Keith @laddkeith.com · 23/06/2026When 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 #heatwavestatic.klipy.comSpider-Man Pointing MemeALT: Spider-Man Pointing Meme 060
Ladd Keith @laddkeith.com · 23/06/2026Extreme 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... #extremeheatazcentral.comExtreme heat warnings expand over Arizona as temperatures climbHeat risks are spreading across Arizona as a high-pressure system strengthens. 110
Ladd Keith @laddkeith.com · 23/06/2026New 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 #heatresiliencenationalgeographic.comHow 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. 110
Ladd Keith @laddkeith.com · 22/06/2026This 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 #heatresiliencebbc.comRed heat alerts issued in France, Italy and Spain as 40C temperatures forecastThe heatwave conditions are forecast to intensify in the coming days across central and western Europe. 141
Ladd Keith @laddkeith.com · 20/06/2026An 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... #extremeheatnytimes.com3 Hikers Die at Grand Canyon Amid ‘Dangerous’ High Temperatures 1112
Reposted by Ladd KeithClimate Central @climatecentral.org · 20/06/2026Today 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... 35629
Ladd Keith @laddkeith.com · 20/06/2026Today is #ShowYourStripes day created by @edhawkins.org to show how temperature has changed over time due to #climatechange. Find your stripes at showyourstripes.info 043
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 031
Reposted by Ladd KeithEd Hawkins @edhawkins.org · 15/06/2026As 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 10461245