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Kelly Hereid

@kellyhereid.bsky.social
30K followers 2.3K following 11K posts

Climate scientist, geologist, and catastrophe modeler, Liberty Mutual. Posts on all things hurricane, wildfire, flood, earthquake, tornado. Sassy takes are mine not employer's. 📍Oakland, CA Website: hereidk.strikingly.com

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Kelly Hereid @kellyhereid.bsky.social · 5h
Finally got time to go through the full report and it knocked my socks off. Cohesive argument that housing, insurance, energy, and transportation costs should be thought of as one interconnected issue, and we should tackle as a package by building smarter in low hazard areas at SCALE.
1) Cut red tape specifically to allow homes of all shapes and sizes in connected, lower-hazard
established neighborhoods.
2) Put public land in lower-hazard established neighborhoods to work.
3) Simplify public financing so dollars for income-restricted housing and starter homes go
further.
4) Make disaster-prepared construction the norm.
5) Build lower utility costs into new homes from the start and make homes critical energy
infrastructure.
6) Align utility reforms with housing affordability and grid reliability.
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John Hanger @jrfhanger.bsky.social · 30/09/2026
"The electrification of road freight is emerging as a structural force that could undermine long-term oil demand across the world." China's goals are EVs to be 50% of truck sales and 20% of its truck fleet by 2030. EVs may be 50% of truck sales in 2026. www.bloomberg.com/news/feature... #energysky
bloomberg.com
China Has an 18-Wheel Answer to Soaring Global Diesel Prices
Around a third of trucks sold in China this year will run on electricity, furthering Beijing’s goal of bolstering energy security.
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Kelly Hereid @kellyhereid.bsky.social · 16h
The most important final consideration for a geologist looking to flex: DOES IT COUNTERTOP? Cuprite, got some cute little cubes, fine. Quartzite countertops, BOOMSHAKALAKA #quartz #MinCup26
Quartzite countertop, DELISH
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Kelly Hereid @kellyhereid.bsky.social · 30/09/2026
Quartz needs you to SAND BY YOUR MAN Or woman. Or mineral. Whatever, QUARTZ! #MinCup26 ⚒️
Soil ternary diagram as song titles with Sand By Your Man colored in with purple
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Kelly Hereid @kellyhereid.bsky.social · 30/09/2026
Quartz needs you to SAND BY YOUR MAN Or woman. Or mineral. Whatever, QUARTZ! #MinCup26 ⚒️
Soil ternary diagram as song titles with Sand By Your Man colored in with purple
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Dr. Kristina Hill ☠️ 🏳️‍🌈 thinks this is a bad timeline @kzhill.bsky.social · 30/09/2026
There’s SO MUCH legacy contamination in coastal soils. We found more than 1400 administratively active sites in the SF Bay Area alone. And there are thousands more that could have residual contamination. In Hawaii, they’ve seen petroleum in groundwater produce explosive levels of methane…
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Jacob Gellman @jacobgellman.com · 29/09/2026
What is the cost of hurricane evacuation? We structurally estimate a travel cost model using data on hurricanes, evac. orders, and billions of obs of cell phone movement. Welfare costs average 55% as a share of mortality costs. (w/ Hennighausen, Watson, Berry.) papers.ssrn.com/sol3/papers....
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Kelly Hereid @kellyhereid.bsky.social · 29/09/2026
Don't threaten me with a good time 😎😎😎
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Kelly Hereid @kellyhereid.bsky.social · 29/09/2026
Heading to Arizona for a talk tomorrow - totally normal to give an insurance talk for a bunch of tree ringers right? Get ready for some hurricanes and wildfires and floods, oh my. outreach.ltrr.arizona.edu/tree-ring-ta... Thanks @thirstygecko.bsky.social for the invite!
Assessing climate impacts in current disaster risk
Or, insurers don't get to wait for 2100
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Kim Cobb @kimcobb.bsky.social · 29/09/2026
And I'm on the search committee, so send me your questions. But mostly, send the talented early career scientists in your network our way! Target deadline: Oct 26
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Dr Wendy Morrison @hillfortian.bsky.social · 25/09/2026
I don't know to whom the credit goes for this! It appears sans ™ on another platform. Brilliant. Students of #ashwell26... This was the soil matrix drawing you deserved, not my poor dry erase board scribbles 😂 #archaeology #geology Please shout if you are the clever originator!
A soil matrix triangle showing percentages of sand, clay and silt, but with regions identified using punny song names like Clay Jude and Only the Loamy
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 28/09/2026
Whelp. After 15 years of me saying “every shark swimming through a flooded city street after a storm photo on social media is fake,” we may finally have a real one. I’m awaiting confirmation from folks with better eyes than mine. abcnews.com/video/136803...
abcnews.com
Shark spotted in New Jersey floodwaters during nor'easter
A dogfish shark was spotted swimming through floodwaters in Surf City, New Jersey, heading up a resident's driveway and then toward Barnegat Bay on Saturday.
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Carolyn Johnson @carolynyjohnson.bsky.social · 03/08/2026
Some personal news! In a few weeks, I'm starting a new job @nytimes.com, joining a science team that I've long admired, followed and envied. It's mylast day @washingtonpost.com - I'm so grateful for the 11 years I got to work with a cast of amazing colleagues. www.nytco.com/press/a-new-...
nytco.com
A New Reporter For Science | The New York Times Company
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Kelly Hereid @kellyhereid.bsky.social · 28/09/2026
For an accessible and fascinating read on where disaster history crosses engineering history, I loved Robert Muir-Wood's Cure for Catastrophe. Clip in next post... 1/2
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Kelly Hereid @kellyhereid.bsky.social · 27/09/2026
Tapio Schneider is one of the scientists I look to most to distinguish AI-useful from AI-hype in climate science world. His thoughtful post on the Navier-Stokes blowup is a great example - AI is useful when experimental verification and data density can substitute for physical understanding... 1/2
clima.caltech.edu
Headlines and inside stories: understanding and trust in AI for mathematics, science, and engineering - CliMA
[This post was prompted by the recent discussions about the Navier-Stokes Millennium Prize problem and is cross-posted from Terry Tao’s blog. It lays out the reasoning behind how we use AI at CliMA.] ...
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Barry Butler Photography @barrybutler9.bsky.social · 27/09/2026
Glass, Like Glass. Sunday's sunrise at the entrance to the Chicago River.
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Aaron Becker @aaronjbecker.bsky.social · 27/09/2026
Lake Erie turned toward autumn in a single week. Every hour of its surface currents, 16 to 23 September 2026, colored by water temperature: the surface lost about 6°F in seven days. Data: NOAA Great Lakes Operational Forecast System (model) #LakeErie #GreatLakes #dataviz
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Kelly Hereid @kellyhereid.bsky.social · 27/09/2026
Science is a part of your brain you just don't turn off. In an $80 Motel Room, a Discovery to Shed Light on the Origins of Life 🎁 link www.nytimes.com/2026/09/26/s...
Sciencing the shit out of this motel room
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Costa Samaras @costasamaras.com · 26/09/2026
everything computer
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Steven J. Gibbons @stevenjgibbons.bsky.social · 26/09/2026
"Propagation of the Storegga tsunami in the southeastern North Sea" is published in Quaternary Research Advances today. Open access paper (doi.org/10.1016/j.qs...) examining the degree to which the tsunami from the 8150 BP Storegga slide would have been able to reach the coasts of Denmark+Germany.
Screenshot of the first page of the paper "Propagation of the Storegga tsunami in the southeastern North Sea" by Steven J. Gibbons et al., Quaternary Research Advances (2026) https://doi.org/10.1016/j.qsa.2026.100345 containing images of figures within the paper and the logos of projects that have supported the work performed.
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Kevin J. Kircher @kevinjkircher.com · 16/09/2026
lady: our data center flexes demand to protect the grid and ratepayers!

guy: how

lady: we use AI to shift load!

guy: how

lady: we run diesel generators when prices spike

guy: thank you
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Jamie Smart @jamiesmart.bsky.social · 25/09/2026
Can’t eat a sandwich until you subscribe to sandwiches. Can’t eat today’s sandwich until it has applied daily sandwich updates. Sandwich now has adverts even though you paid for ad-free sandwich. Can pay again to have less sandwich adverts. Now you can eat the sandwich, but it’s smaller.
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Chris Conaton @conatonc.bsky.social · 26/09/2026
A familiar story for anyone who follows @volts.wtf. “The Chronicle spoke to more than half a dozen grid experts…to try to understand why Texas’s notoriously unreliable grid had a remarkably reliable summer. The answer was unanimous: solar panels and batteries.”
houstonchronicle.com
Texas shattered energy demand records this summer. Here's why the grid held up.
Texas repeatedly broke electricity demand records this summer, but ERCOT avoided emergencies as booming solar and battery capacity helped keep the grid stable.
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Brian McNoldy @bmcnoldy.bsky.social · 25/09/2026
If you haven't discovered @pyreweather.bsky.social yet, today's the day! It is brilliant on its own merit, but if you're a PSL Daily Composite refugee like me, you have a new home. It's fast, flexible, and feature-packed... 💯% recommend.
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Kristian Svennevig @ksvenenvig.bsky.social · 25/09/2026
3D-print your own landslide! New paper out in @geomorphica.bsky.social "Open access 3D-printable landslide models for outreach and teaching" journals.psu.edu/geomorphica/...
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Mike Dettinger @mdettinger.bsky.social · 25/09/2026
SWOT is revealing a world dominated by 'weird rivers'. By simultaneously measuring water levels & breadths of rivers globally, SWOT exposes the extent of human effected on rivers. (They are dammed, braided, frozen, and/or drained—in ways models struggle to capture.) www.science.org/content/arti...
science.org
Satellite reveals a world of ‘weird rivers’ shaped by humans
SWOT is exposing humans’ effects on rivers—and challenging flood prediction models
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Jesse M. Keenan @jessemkeenan.com · 25/09/2026
Here is the story on our new JPER paper @bloomberg.com mberg.com via @leslieatlarge.bsky.social Sometimes getting a good deal is not a great deal, if you get my deal. www.bloomberg.com/news/article...
bloomberg.com
Homebuyers in Wildfire-Prone Areas Get Better Mortgage Deals Online
A new study found online lenders were more likely to approve loans in areas at high risk of wildfire and offered better rates than their brick-and-mortar counterparts.
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Dave Rodland @daverodland.bsky.social · 25/09/2026
By special request, we have Seven Dead Sins for #FossilFriday... we can debate their theological status, but in the immortal words of Dr. McCoy, they done shuffled off the mortal coil. Or something like. 🧪⚒️☠️ First up ... naah, who are we kidding? Sloth is never first to the party. Just wants hugs.
Replica: Megalonyx jeffersoni skull, a giant ground sloth.
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AFP News Agency @en.afp.com · 24/09/2026
🇨🇱 💮 Chile's Atacama Desert blossoms with life after El Nino rains A resplendent display of flowers has bloomed across Chile's Atacama Desert, one of the driest places on earth, after the El Nino climate phenomenon brought heavy rain to the region
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Richard Waite @waiterich.bsky.social · 25/09/2026
Why did they call it “banning partially hydrogenated oils” and not “Panic! At The Crisco”
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Kelly Hereid @kellyhereid.bsky.social · 25/09/2026
Really glad to see this feature analytics from @kuanbutts.bsky.social and board advocacy from @therealjeanwalsh.bsky.social Would love to see a ridership-weighted version of these horrible reliability figures - it's not just that they're bad, it's that they're bad on big lines like 1T and 51A.
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Anya Hess @anya-hess.bsky.social · 24/09/2026
Very excited to announce our paper is out in Science Advances @science.org! Our reconstructions show Pacific Walker Circulation was stronger during the Little Ice Age, consistent with projections of weakening with future warming www.science.org/doi/10.1126/... @whoi.edu @rutgersupress.bsky.social
science.org
A strong Pacific Walker Circulation during the Little Ice Age
Reconstructions of climate over the past millennium provide context for disentangling anthropogenic forcing from natural multidecadal variability. However, the strength of the east-west tropical Pacif...
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Tim Jesper Suhrhoff @climatejesper.bsky.social · 22/07/2026
What if carbon removal could help clean PFAS-contaminated soils—and help pay for it? Our new paper explores a potential win-win-win: enhanced weathering can boost plant PFAS uptake, while pyrolysis destroys PFAS and stores carbon as biochar. paper: doi.org/10.1073/pnas...
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Tim Jesper Suhrhoff @climatejesper.bsky.social · 24/09/2026
For a century, we’ve essentially been running an Enhanced Weathering field trial. In our Nature paper out yesterday, we show that agricultural liming in the Mississippi River Basin acted as a net CO₂ sink—while offering a rare century-scale analogue for EW. www.nature.com/articles/s41...
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Aaron Becker @aaronjbecker.bsky.social · 23/09/2026
More than half the buildings standing in Los Angeles today were already up by 1950, before almost any of the freeways existed. The ten years from 1947 to 1956 alone account for nearly a third. Data: LA County Assessor + LARIAC #LosAngeles #California #maps #dataviz
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Aaron Becker @aaronjbecker.bsky.social · 22/09/2026
You could find your way along the Nova Scotia coast blind, just by timing the blinks. Every lighthouse flashes on its own rhythm, a set interval and colour no neighbour repeats. Sambro Island off Halifax has burned since 1758, the oldest working lighthouse in North America. #lighthouse #NovaScotia
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Paul Byrne @theplanetaryguy.com · 23/09/2026
I said I'd do a thread about my new Space Science Reviews paper, so here it is! This is part of a collection of papers arising from a meeting at the International Space Science Institute in Bern in 2024: a workshop to better understand rocky extrasolar planets. A 🧵:
Interior structure models of Earth, Venus, Mercury, Mars, the Moon, and Io, all shown to scale and key elements labelled.
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Bart⚓️ @bartgonnissen.bsky.social · 23/09/2026
The Facial Expressions of Tethys by artist Julius von Bismarck. A suspended high-sea buoy that moves in real time. Sensors on a twin buoy out in the Atlantic Ocean send live satellite data to motors inside the museum. This makes the indoor buoy copy the exact, real-time movements of the ocean waves.
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Dr. Asmeret Asefaw Berhe @aaberhe.com · 23/09/2026
✨New Account👇🏽, follow us✨ Last week, we announced establishment of the UC Merced Earth Institute on the storied foundations of the Sierra Nevada Research Institute & merger w/ the Climate Institute I am honored to lead this next great chapter of Earth & Environmental Sci & Eng research on our campus
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Jeff Berardelli @weatherprof.bsky.social · 23/09/2026
Looking at all cases globally of both Rapid Intensification and Extreme Rapid Intensification (ERI), you can see where #Polo falls on that scale (magenta star). It’s the 5th most intense in the NOAA record since 1980. 1/
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Colin Carlson @colincarlson.bsky.social · 23/09/2026
What's behind this tidal wave of epidemics? In the largest study ever conducted on emerging infectious diseases, we show that the popular explanation - "our relationship with nature is out of balance" - doesn't hold up. Out now in Nature, after half a decade of work: www.nature.com/articles/s41...
nature.com
The anthropogenic fingerprint on emerging infectious diseases - Nature
Emerging infectious disease outbreak risks are ubiquitous worldwide, and highest in landscapes where people, livestock and fragmented natural ecosystems coexist, but detection and data ...
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Dr Dan Shugar 🇨🇦 @watershedlab.bsky.social · 23/09/2026
Pretty great day exploring UNESCO World Heritage Site at Stevns Klint w/ @ksvenenvig.bsky.social where the Cretaceous-Triassic boundary (dinosaurs go bye bye) is particularly well-exposed 🧪⚒️
Grey layer of clay called the Fish Clay at rh K-T boundary in a rockFinger pointing at the K-T boundary on a cliff
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Prof. Anders Levermann, PhD @alevermann.bsky.social · 23/09/2026
Two recent studies in PNAS show: 1) Fractures (which are not represented in current ice sheet models) can easily double the ice loss of a region 2) The fastest changing outlet in Antarctica, Pine Island Glacier, has lost almost all traction due to fractures ... www.pnas.org/doi/abs/10.1...
pnas.org
Fracture-driven weakening amplifies projected ice loss from West Antarctica | PNAS
Ice shelves buttress the flow of the Antarctic ice sheet, but this stabilizing effect weakens as fractures form, reducing ice viscosity and acceler...
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Jan Rosenow @janrosenow.bsky.social · 22/09/2026
The headline electrification rate undersells electricity. It's 23% of final energy but delivers almost 40% of useful energy: the heat, mobility, cooling and light people actually need.
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Jan Rosenow @janrosenow.bsky.social · 22/09/2026
🔥 HOT OFF THE PRESS For the first time ever, @iea.org has published a dedicated Electrification Report. An absolute treasure trove of data. Here are the key takeaways that stood out to me when I peer-reviewed it. 🧵
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Kelly Hereid @kellyhereid.bsky.social · 23/09/2026
And, like basically every climate paper that hits the socials these days, lots of sharing here on bsky and a ghost town on Twitter:
Altmetric badge for NCA6+, with 109 bsky posters and 1 (one) on X
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Keishu Asada @cephwarden.bsky.social · 23/09/2026
One of my favorite nudibranchs, Bornella anguilla, swimming like some sort of psychedelic dragon
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Zack Labe @zacklabe.com · 22/09/2026
We have a new #OpenAccess commentary piece out in @aguadvances.bsky.social: doi.org/10.1029/2026.... This article introduces a new collection of “Impactful Datasets in Earth, Space, and Environmental Sciences” by @agu.org. I was very excited to support the nomination of the NSIDC’s Sea Ice Index.
doi.org
Impactful Datasets in Earth, Space, and Environmental Sciences: Highlighting the Data That Transform Research
American Geophysical Union announces the new living collection “Impactful Datasets in Earth, Space, and Environmental Sciences” Nominators submit datasets impactful to their work along with perso...
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Brian Matilla @bxmatilla.bsky.social · 22/09/2026
Hurricane Polo's rapid intensification is seriously impressive... A special 19Z update was issued by the NHC stating that reconnaissance aircraft found that Polo's central pressure is sitting at 892 mb, the 2nd strongest EPAC hurricane by pressure only behind Hurricane Patricia (2015; 872 mb).
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Brian Tang @btangywx.bsky.social · 22/09/2026
NOAA reconnaissance data coming out of Hurricane Polo are nothing short of spectacular and indicative of a very intense, compact, and tall hurricane.
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