Katharine Hayhoe

I’m a scientist who studies how climate change impacts our lives and the places we love. Most of us are worried, but many feel stuck on what to do. If that's the way you feel, check out this list below! We can’t fix it alone, but I know we can together. 💚

I was recently asked if we should replace the IPCC with something less flawed. My answer is that nothing else could inspire top scholars worldwide to volunteer years of their lives to produce a definitive source on the state of our climate, impacts, and solutions. We have to fund the IPCC.

Whoa! Along with the record noted by @bmcnoldy.bsky.social below, this is Miami's longest string of days with coastal flooding reaching at least moderate levels (now seven days and counting). More here: yaleclimateconnections.org/2026/10/reco...

Solar has overtaken nuclear. A decade ago it supplied 1% of the world's power. In 2025 it met three quarters of global demand growth. Almost nobody saw it coming. I spoke to Jocelyn Timperley at BBC Future about why. www.bbc.co.uk/future/artic...

Seagrass meadows have a vital role in the fight against poverty.

This week, thousands of delegates from around the world are meeting in Yerevan, Armenia, to review progress on key nature targets agreed for 2030. Carbon Brief’s @orladwyer.carbonbrief.org reports from Yerevan.

How a fake Loch Ness Monster helped bring a dammed-up river back to life -- and how climate change is coming for your pumpkins. Read on!

“Vipond is now a 20-year-old university student studying environmental science at the University of British Columbia. Next week, she will be sitting inside a courtroom in Vancouver telling her story of how extreme weather and climate change have affected her health and quality of life.” #prouddad

Peak application of dendrochronology. 10/10, no notes.

Six months ago I started the Climate Joy Project. 31 interviews later, I’ve learned climate heroes are everywhere and joy is contagious. Thank you, Dr. @katharinehayhoe.com for helping me find this community! 🌎💚 climatejoyproject.com

I recently witnessed large-scale geothermal energy production and building heating in Iceland. Awesome in every way! Every country that can should scale up these geothermal technologies ASAP. They are great ways to keep prices low while providing clean, healthy, secure sources of energy & heating.

Sharing one of my favourite phenomena for #FossilFriday: when a drill core bullseyes a fossil! This one, from the Silurian of Estonia, has caught some exceptionally preserved body segments of a pterygotid eurypterid. ⚒️🧪

🌳💧How often does a walk in the woods or a stroll along a river spark your curiosity? 🥽 🛣️ Click below to see our team's journey from curiosity to scientific discovery across Arizona's ponderosa forests, rivers and desert wetlands. lnkd.in/p/gW9QDGmG Watch the full video now: nature.ly/3VWHgqU

Of the 50,000 heat deaths in Europe in the summer of 2026, 32,000 were killed by fossil fuels. Meanwhile, $65 billion in windfall profits for five biggest oil and gas companies in second quarter of 2026. www.npr.org/2026/10/23/g...

Every year, Research!America does a poll that asks, "Can you name a living scientist?" In January 2026, 76% of respondents said "no." Of those who said "yes," 5% named a scientist who was, in fact, dead. www.researchamerica.org/blog/can-you...

How a fake Loch Ness Monster helped bring a dammed-up river back to life -- and how climate change is coming for your pumpkins. Read on!

A huge win for Kenya! 🎉 Thamani Asili brings together long-term investment and ambitious conservation commitments to help create lasting benefits for communities, biodiversity and the country's future. 🌍

New essay from me about a Chinese-owned data center in rural central Oklahoma (El Reno, pop. 16K) that was operating illegally and drained the municipal water supply during the teeth of an extreme drought, closing public schools. Minor irony: it has no website. www.sehn.org/sehn/2026/10...

What does the best conversation look like it? This! We ranged from mushroom burials to rewriting the Bible. And of course, a lot about climate action & hope – which @margaretatwood.bsky.social says is built into us. Because people in the past who didn’t have hope? They didn’t have descendants 😄

Our Tundra Connections broadcast season starts today! Kick off polar bear season with us and learn all about how polar bears have adapted to thrive in the Arctic. Register here: pbears.org/4z1X1va

Making mischief plans for the day. Photo from my collection, no date/info.

My investigation for @nature.com finds a surge of open records requests from groups with ties to the energy industry targeting climate attribution researchers. They come as the field plays a growing role in lawsuits suing big emitters for climate-related damages. www.nature.com/articles/d41...

What does the best conversation look like it? This! We ranged from mushroom burials to rewriting the Bible. And of course, a lot about climate action & hope – which @margaretatwood.bsky.social says is built into us. Because people in the past who didn’t have hope? They didn’t have descendants 😄

81% of the 2400 stocks in the MSCI's global stock index are already suffering losses due to extreme heat, costing $3.9 trillion every year. There are no safe havens from climate change, not even in a stock portfolio Gift link to my @opinion.bloomberg.com column: www.bloomberg.com/opinion/arti...

Read the latest on the topic everyone is talking about: Alfvénic modulation. #AGUPubs eos.org/research-spo...

Dr Evil has completed his inspection of my mother’s rock collection and would like to speak to the management about a few of the issues he identified. #caturday

Did you know my Talking Climate newsletter is also a podcast? You can listen to the good news, not so good news, and what you can do every week! Episodes are just 5 to 8 min, perfect for a short commute, a brief walk, or while you’re doing a chore. Listen here: www.buzzsprout.com/2510972/epis...

Updated estimates of 2026 + 2027 expectations - new and improved graphic! data.giss.nasa.gov/gistemp/gmsta/

Dr Evil has completed his inspection of my mother’s rock collection and would like to speak to the management about a few of the issues he identified. #caturday

This week I handed my newsletter to the one and only @queenofpeat.bsky.social, ecologist Merritt Turetsky. Her big idea? Stop treating wet land as a problem to drain. Start seeing it as something to work with instead! Read on to learn more about becoming a bog champion.

In Canadian North, Massive Permafrost Slides Show Climate Feedback in action thinc.blog/2026/10/14/i...

Did you know my Talking Climate newsletter is also a podcast? You can listen to the good news, not so good news, and what you can do every week! Episodes are just 5 to 8 min, perfect for a short commute, a brief walk, or while you’re doing a chore. Listen here: www.buzzsprout.com/2510972/epis...

BOG ALERT It’s official: Bogland is OUT IN THE US TODAY! I wrote a book about weird, wonderful, squelchy wetlands. There are mosses, mysteries, things preserved for thousands of years (people, butter). And now I get to share all this bog weirdness with you. Are you ready to get bogged down?

From @sarahkaplan48.bsky.social Survivors of the 2023 Maui wildfires had high amounts of toxins in their urine for as long as 18 months after the fire. Another study found that lead concentrations in the Eaton Fire smoke were up to 250x higher than normal. www.washingtonpost.com/climate-envi...

Study of 10,000 faculty finds women leave academia because they feel pushed out, not pulled toward another opportunity. Analysis of 6,615 comments showed a gender gap of feeling devalued: 41% of women vs 18% of men. www.science.org/content/arti...

This week I handed my newsletter to the one and only @queenofpeat.bsky.social, ecologist Merritt Turetsky. Her big idea? Stop treating wet land as a problem to drain. Start seeing it as something to work with instead! Read on to learn more about becoming a bog champion.

DYK that African-Americans also have traditional ecological knowledge. Our relationships to our environment survived the Middle Passage! Talk about resilience! #BMW2026Resilience #BlackSky thelansingjournal.org/2025/08/06/a...

It is tragically a devastating feature of arid lands which does not bode well for the future: instability drives the sale of girls by desperate families in arid areas. We must help change this.

I love that the creator of Climate Fortnite is one of the recipients! Showing that climate communication and cutting edge science can absolutely go hand in hand.

Featuring our university and one of our brave climate center members, Sara, front and centre.

According to the TH Chan School of Public Health at Harvard, women are much more profoundly affected by gas stove emissions than men. @governor.ny.gov sign S1280b into law. Consumers should know what they're buying. @hsph.harvard.edu @msmagazine.com @nrdc.org hsph.harvard.edu/news/gas-pro...

On my morning walk yesterday I saw such an unusual sight, I had to stop for a picture! On a field trip later the same day, I heard the full story – this is the culmination of a 20 year collaborarive philanthropic effort to remove the old industrial dams and restore the rapids to the Grand River 👏👏👏

40% of *everything being shipped everywhere on Earth* is fossil fuels Just an absolute laughing-stock clown-show of an energy source. This is laughably absurd, why do we treat this like it's normal and good Fossil fuels are a satirical fuel www.irena.org/-/media/File...

New knitting stitch just dropped, and I got to draw it!! www.scientificamerican.com/article/math...