Reposted by Steve KollerNational Weather Service @nws.noaa.gov · 18h10/08/2026, 4p CT Update Hurricane Isaias has strengthened into a Category 2 storm. Additional strengthening is expected through early Friday, and Isaias should remain a dangerous hurricane as it approaches the northern Gulf Coast Friday night. 412963
Reposted by Steve KollerJared Rennie @jjrennie.bsky.social · 07/10/2026I think a lot about this video made by the Weather Channel indicating how high these actual colors mean. It might seem silly to some, but it's really REALLY informative and helps contextualize the water. Impacts Impacts Impacts #Isaías www.youtube.com/watch?v=q01v...youtube.comStorm Surge Like You've Never Experienced it BeforeYouTube video by The Weather Channel 0257
Reposted by Steve KollerEric Roston @eroston.bsky.social · 19hEl Niñissimo! www.bloomberg.com/news/article... 42018
Steve Koller @stevekoller.bsky.social · 22hKey messages about Hurricane Isaias from the NOAA National Hurricane Center as of 10 a.m. CDT. Expected landfall is tomorrow evening. Isaias is the first Atlantic hurricane of the 2026 season, after a historically-inactive June to September period. Live updates: www.nhc.noaa.gov/mobile/refre... 000
Steve Koller @stevekoller.bsky.social · 23hThis vintage hydrant is giving iceberg! Nice visual reminder that so much important public infrastructure is beneath the surface, out of view of the naked eye.. 010
Reposted by Steve KollerShawn Hubler @shawnhubler.bsky.social · 06/10/2026He ran L. A.’s major newspaper and the nation’s second largest school district. None of that has fixed the toxic smoke that has poisoned his house. www.nytimes.com/2026/10/06/u...nytimes.comL.A. Philanthropist Says Suit Over Fire Damage Is a Blow for the PeopleAustin Beutner has filed a lawsuit that highlights a central dispute after the 2025 Los Angeles fires: Who pays when a house survives the flames but not the smoke? 1134
Steve Koller @stevekoller.bsky.social · 04/10/2026Beautiful, muggy evening on the National Mall last night. Text here is from President Lincoln’s second inaugural address (delivered 35 days before Lee surrendered to Grant and 41 days before his assassination). 🇺🇸 000
Reposted by Steve KollerBob 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, ... 114884
Reposted by Steve KollerCosta Samaras @costasamaras.com · 23/09/2026There's lots of reasons for despair, but here's a small bit of light: it's not hard to make change when you work together. 175 climate researchers volunteered time to ensure communities are informed about climate risks. Led by Melissa Kenney, @bobkopp.net, & me, free to read: 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, ... 519261
Steve Koller @stevekoller.bsky.social · 26/09/2026Floodnet sensors find flooding across four NYC boroughs during high tide this morning, more than two feet in some neighborhoods around Jamaica Bay. Also a foot and a half in Red Hook. 000
Steve Koller @stevekoller.bsky.social · 26/09/2026According to NYC's Floodnet, some significant flooding during tonight's high tide around Jamaica Bay. Currently 12" at one chronically-flooded location in Arverne in the Rockaways. dataviz.floodnet.nyc 120
Steve Koller @stevekoller.bsky.social · 25/09/2026Stevens Flood Advisory System forecasts moderate flood levels in Jamaica Bay-adjacent neighborhoods in Queens at high tide tomorrow morning as a result of this nor'easter. Ensemble forecast doesn't rule out "major flood" levels. hudson.dl.stevens-tech.edu/sfas/d/index... 110
Reposted by Steve KollerEos @eos.org · 21/09/2026Scientists expect very strong El Niño conditions this fall, and California is preparing—Gov. Gavin Newsom declared a statewide emergency today in anticipation of coastal damage and flooding from El Niño-fueled storms. www.sfgate.com/news/article...sfgate.comCalifornia declares statewide emergency ahead of epic El Niño stormsGov. Newsom has declared a statewide emergency for California in anticipation of this winter's El Niño-fueled storms 1169
Reposted by Steve KollerDr. Jeff Masters @drjeffmasters.bsky.social · 20/09/2026100 years ago yesterday, the 1926 Great Miami Hurricane caused profound destruction, plunging the city into a deep economic downturn. Four groups say a repeat would cost over $200 billion. Such a catastrophe, like the 1926 hurricane, would cleave Florida history into a “before” and an “after.”yaleclimateconnections.orgA repeat of Miami’s 1926 hurricane could cost over $280 billion. That's more than Hurricane Katrina. » Yale Climate ConnectionsA century of development, rising seas, and climate change have made South Florida far more vulnerable to a catastrophic storm. 49640
Reposted by Steve KollerSteve Bowen @stevebowen.bsky.social · 18/09/2026Today marks the 100th anniversary of the Great Miami Hurricane, which brought Category 4 wind / surge damage to a city which was still in its infancy. Things have changed A LOT since. Just look at the graphic below highlighting population and housing unit totals from 1900-2025. Staggering! (1/2) 194
Reposted by Steve KollerLos Angeles Times @latimes.com · 10/09/2026The Trump administration wants to revise the latest National Climate Assessment—three years after publicationlatimes.comThe Trump administration wants to revise the latest National Climate Assessment—three years after publicationExperts said amending the finalized federal climate report would be unprecedented. 6136
Reposted by Steve KollerHarvard Joint Center for Housing Studies @harvard-jchs.bsky.social · 26/08/2026Extreme heat is getting worse. July 2026 was the warmest month on record and the rates of heat-related illness across geographic regions are disproportionately impacting lower-income communities and communities of color, writes @sophiawedeen.bsky.social. www.jchs.harvard.edu/blog/unmet-r...jchs.harvard.eduUnmet Repairs Leave Millions Exposed to Extreme Indoor Heat 023
Reposted by Steve KollerLos Angeles Times @latimes.com · 19/08/2026State approves 'Zone Zero' fire-safe landscaping rules, reshaping yards for millions of Californianslatimes.comState approves 'Zone Zero' fire-safe landscaping rules, reshaping yards for millions of CaliforniansThe California Board of Forestry approved "Zone Zero" regulations outlining what residents in fire-prone areas can plant, build and store near their homes. 1167
Reposted by Steve KollerHarvard Joint Center for Housing Studies @harvard-jchs.bsky.social · 13/07/2026Property insurance costs are a threat to multifamily affordable housing. Recent @gsd.harvard.edu graduate Ariella Amit shares what multifamily affordable housing owners and developers can do to manage high property insurance costs. @neighborworks.bsky.social www.jchs.harvard.edu/blog/managin...jchs.harvard.eduManaging Property Insurance Costs in Multifamily Affordable Housing Organizations 133
Reposted by Steve KollerClimateFran @climatefran.bsky.social · 06/08/2026There is a lot of interest right now in lowering insurance rates while building resilience to natural disasters. A win-win? Perhaps, but its complicated. New report on Insurance and Risk Reduction from @ckousky.bsky.social at Insurance for Good static1.squarespace.com/static/629aa...static1.squarespace.com 0173
Reposted by Steve KollerMarshall Shepherd @drshepherd2013.bsky.social · 17/07/2026My thoughts on whether World Cup Finals match in New York will be disrupted by wildfire smoke. www.forbes.com/sites/marsha... 1167
Steve Koller @stevekoller.bsky.social · 15/07/2026Smells like wildfire and looks like Blade Runner in Cambridge, MA today. AQI was above 140 earlier 🔥😷 000
Reposted by Steve KollerAndrew Rumbach @andrewrumbach.bsky.social · 12/07/2026What better way to spend your Sunday than to read 2,500 words on the Reforming Disaster Recovery Act? The next period will hugely shape how the U.S. government supports communities after disasters. My breakdown of the law and key questions moving forward: andrewrumbach.substack.com/p/the-21st-c...andrewrumbach.substack.comThe 21st Century ROAD to Housing Act is Law: What Comes Next For Disaster Recovery?On June 23rd, the U.S. 152
Reposted by Steve KollerThe New York Times @nytimes.com · 10/07/2026President Trump refused to sign a major bipartisan housing bill to protest Republican inaction on voting restrictions. The housing measure will become law without his signature at midnight unless he vetoes it, which he did not say he would do. Follow live updates.nyti.msLive Updates: Trump Refuses to Sign Housing Bill, Which Becomes Law at Midnight Unless He Vetoes It 207523
Reposted by Steve KollerNick Angarone @nickangarone.bsky.social · 08/07/2026I’m frustrated. 29 deaths in #NJ from extreme heat last week. More flooding that destroys people’s lives, hurts local businesses, and disrupts our communities. Tens of thousands of homes without power. Again. We need a stable source of state funding for #ClimateResilience. 141
Reposted by Steve KollerJesse Gourevitch @jgourevitch.bsky.social · 01/07/2026🚨 I’m pleased to share a new open-access article published today in the Review of Environmental Economics and Policy: “Managing Unpriced Climate Risks in US Housing Markets” 🚨 23013
Steve Koller @stevekoller.bsky.social · 29/06/2026Tragic loss of life. Roughly 75% of French households don’t have air conditioning. www.bbc.com/news/article...bbc.comEurope heatwave: Air conditioning creates political divide as France records hottest dayFrance is being forced to re-think its longstanding reservations about air-conditioning as temperatures soar. 000
Reposted by Steve KollerJesse Gourevitch @jgourevitch.bsky.social · 01/06/2026Excited to share a new paper, with co-authors Adam Gold and Helena Garcia, published today in Nature Water: “The economic value of wetlands in reducing riverine flood losses in the USA” 🎉 www.nature.com/articles/s44...nature.comThe economic value of wetlands in reducing riverine flood losses in the USA - Nature WaterWetland conservation is an undervalued strategy for managing flood risk exacerbated by climate change. This study quantifies the impact of wetland loss on flood insurance claims across the USA, reveal... 1319
Reposted by Steve KollerYale Climate Connections @climateconnections.bsky.social · 29/05/2026The best time to prepare for a hurricane is long before one is forecast. If you live in a hurricane-risk area, start your preparations today: yaleclimateconnections.org/2019/07/how-...yaleclimateconnections.orgHow to prepare for a hurricane » Yale Climate ConnectionsHere's what to do to protect yourself, your property, and your family. 0124
Reposted by Steve KollerEvan George @evanlgeorge.bsky.social · 28/05/2026NPR is shrinking its newsroom through layoffs and buyouts and is reducing staff dedicated to covering both climate and science. "The climate desk no longer exists separately but has been folded into the National Desk," writes Neela Banerjee, who headed the climate desk but was just laid off. 23679309
Reposted by Steve KollerHarvard Joint Center for Housing Studies @harvard-jchs.bsky.social · 22/05/2026Our Center seeks applications for a 𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗔𝘀𝘀𝗶𝘀𝘁𝗮𝗻𝘁 to research topics related to home improvement and repair markets, housing preservation and adaptation, disaster recovery and climate resilience, demographics and finances, housing policy, and more. www.jchs.harvard.edu/research-ass... 022
Reposted by Steve KollerKyle Walker @kylewalker.bsky.social · 22/05/2026My home Census tract in Corvallis is now at 94.7% with AC (my parents eventually got it too) More about the data: census.gov/data/experim... Map it at the tract level yourselves: gist.github.com/walkerke/71e...census.govLocal Air Conditioning Estimates 021
Steve Koller @stevekoller.bsky.social · 21/05/2026California FAIR Plan's total exposures, number of policies, and earned premiums continue to break records. There were more than 640k policies in effect in March 2026. Roughly half of FAIR Plan policyholders will see a 30-50% increase in premiums starting in October, primarily due to wildfire risks. 000
Reposted by Steve KollerJohn Voorheis @johnvoorheis.bsky.social · 18/05/2026I have two new papers up in this week's NBER working papers (www.nber.org/papers/w35204 and www.nber.org/papers/w35219). Here's a couple of things I learned in pulling these papers together.nber.orgFlood Risk, Insurance, and Housing in the United StatesFounded in 1920, the NBER is a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings among academics, public policy makers, an... 1247
Steve Koller @stevekoller.bsky.social · 14/05/20262025 was a historic year for wildfire and urban conflagration, with the LA fires becoming the costliest wildfires on record in the US. Rising atmospheric GHG concentrations and an El Niño year set the stage for a challenging wildfire season in 2026. www.insurancejournal.com/news/interna...insurancejournal.comWorst Start to Wildfire Season Raises Alarm as El Niño ThreatensRecord-breaking heat and drought have fueled the world's worst ever start to a wildfire year, as climate change and a developing El Niño threaten to push 010
Reposted by Steve KollerRiordan Frost @riordanfrost.bsky.social · 11/05/2026Happy #MapMonday! Where are mobile homes most vulnerable to flooding? Find out in this interactive map from Headwaters Economics: headwaterseconomics.org/natural-haza.... Mobile homes are key to housing affordability, making these climate risks especially urgent to understand and address. 053
Reposted by Steve KollerSteve Bowen @stevebowen.bsky.social · 08/05/2026Hurricane preparedness tip? If you don't have flood insurance and want it ahead of peak season -- buy it now! There's a standard 30-day waiting period before NFIP policies activate. FYI: NFIP take-up continues to decline, and this cannot be fully attributed to private market options coming online. 01414
Reposted by Steve KollerJenny Schuetz @jennyschuetz.bsky.social · 30/04/2026Come join my team! We're hiring an Analyst to join AV's housing team. This is a great opportunity for early-career folks interested in the pro-housing ecosystem to support philanthropic investments, advocacy, and policy engagement. Details below: www.arnoldventures.org/careers/infr...arnoldventures.orgArnold Ventures | Infrastructure Analyst, HousingExplore careers at Arnold Ventures and join teams working toward lasting, measurable change. 01412
Reposted by Steve KollerKelly Hereid @kellyhereid.bsky.social · 29/04/2026Delighted to share our new sea level risk project led by Daniel Gonzalez-Duque: But that sea level risk is... UNDERGROUND?? Read on... 🧵 agupubs.onlinelibrary.wiley.com/doi/10.1029/...agupubs.onlinelibrary.wiley.comFrom Hydraulic Heads to Dollars and Decision: It's Time to Integrate Groundwater in Coastal Risk AssessmentDamage to underground infrastructure from groundwater responses to sea level rise can and should be economically quantified Loss functions and life cycle costing are two ways of quantifying econo... 25822
Steve Koller @stevekoller.bsky.social · 30/04/2026County-level data from Insurify and FEMA’s National Risk Index. Article quotes a California homeowner whose homeowners insurance premium rose 9x in two years to more than $16k. 010
Reposted by Steve KollerJohn Gramlich @johngramlich.bsky.social · 30/04/202625% of non-homeowners in the US expect to buy a home in the next five years. That's the lowest percentage since @gallup.com started asking that question in 2013. news.gallup.com/poll/708995/... 082
Reposted by Steve KollerNature @nature.com · 26/04/2026All 22 members of the board that advises and oversees the US National Science Foundation (NSF), a leading funder of basic science, were fired on 24 April without explanation. go.nature.com/42tkCGvgo.nature.comEntire NSF science advisory board fired by Trump administrationMembers of the National Science Board, which the US Congress founded in 1950, were given no explanation for their termination. 15184157
Reposted by Steve KollerKelly Hereid @kellyhereid.bsky.social · 25/04/2026Not getting a ton of attention, but wildfires in GA/FL have now destroyed 120 structures in the midst of heavy drought conditions 🎁 Wildfires Destroy Dozens of Structures in Georgia, Governor Says www.nytimes.com/2026/04/24/u...nytimes.comWildfires Destroy Dozens of Structures in Georgia, Governor Says 22420
Reposted by Steve KollerMiriam Wasser @miriamwasser.bsky.social · 22/04/2026"Everything helps!" Massachusetts officials predicted the average household with a heat pump would save $540 on their electric bills this past winter, thanks to the new discounted heat pump rate. www.wbur.org/news/2026/04... 0116
Reposted by Steve KollerYonah Freemark @yonahfreemark.com · 17/04/2026When NYC rezoned Brooklyn's Gowanus neighborhood to allow high-density residential uses along a cleaned-out canal, it hoped to attract thousands of new housing units. That's exactly what it got, new research comparing upzoned areas to similar, non-upzoned areas shows: www.urban.org/research/pub... 416534
Reposted by Steve KollerThe New York Times @nytimes.com · 16/04/2026Mayor Zohran Mamdani announced on Thursday that New York City will invest in a new program to provide cheaper property and liability insurance to landlords of affordable housing and rent-stabilized buildings.nytimes.comMamdani Announces Plan to Lower Insurance Costs for Landlords 417628
Steve Koller @stevekoller.bsky.social · 14/04/2026Such a key point! This construction productivity trend plot from Richmond Fed also nags at my mind in these convos. Not exactly moving in the right direction when it costs more to rebuild a house than it did to build in the first place.. www.richmondfed.org/publications... 110
Steve Koller @stevekoller.bsky.social · 14/04/2026Far-below-average snowpack in California (just 23% of historical average as of today) is creating conditions for elevated wildfire risks this season. Earlier-than-usual fuel clearing, home hardening, and creation of defensible space can mitigate some of these risks. calmatters.org/environment/...calmatters.orgWhat California’s awful snowpack means for fire seasonWith reservoirs brimming, but snowpack abysmal, experts warn of a potentially early fire season. 041
Steve Koller @stevekoller.bsky.social · 13/04/2026Don't have project-level info like in the RAND study at arm's length, but definitely see similar regional building cost differences for single-family in Census's Survey of Construction data. eyeonhousing.org/2025/10/squa...eyeonhousing.orgSquare Foot Prices Moderate in 2024 – Eye On HousingMedian square foot prices for new single-family detached (SFD) homes started in 2024 grew modestly, according to NAHB’s analysis of the latest Survey of Construction (SOC) data. For custom, or contrac... 110