Katharine Hayhoe

@katharinehayhoe.com

140K followers 15K following 8.8K posts

climate scientist
posts 100% my own
🇨🇦 is my home

distinguished professor & chair, Texas Tech
chief scientist, The Nature Conservancy
board member, Smithsonian NMNH
alum, UToronto and UIUC
author, Saving Us

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Katharine Anne Scott Hayhoe is a Canadian atmospheric scientist. She is a Paul Whitfield Horn Distinguished Professor and an Endowed Chair in Public Policy and Public Law at the Texas Tech University Department of Political Science. In 2021, Hayhoe joined the Nature Conservancy as Chief Scientist. .. more

Environmental science 57%

Geography 18%

Posts Replies Media Videos

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Katharine Hayhoe @katharinehayhoe.com · Jan 9

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. 💚

A list of the most effective ways an individual can catalyze change at the scale we need to effectively tackle climate change, based on social science.

Katharine Hayhoe @katharinehayhoe.com · 6h

So to recap: you believe know more than a scientist and you won’t read anything you disagree with. That’s the exact profile of a dismissive.

Katharine Hayhoe @katharinehayhoe.com · 10h

Dang we just finished in-laws Christmas literally just up the road this morning. Tell me which one it is for next year!

Substack

A climate reality check from Bill McKibben

Solar energy pays off in Australia, the US turns back the clock on climate action, and help Third Act simplify solar This week, I’m honoured to have my friend Bill McKibben guest edit this newsletter. Bill is one of the most well-known and longest-serving climate activists in the U.S., and he knows a thing or two about how hope keeps us going, even in the face of seemingly insurmountable odds. We share a deep passion for engaging people in climate action, and we’re both motivated …

Reposts 3 10h

Reposted by Katharine Hayhoe

City Atlas @cityatlas.bsky.social · 11h

"Was I losing my mind?" -- a quote that covers much of 2025, and will likely fit in 2026 too. But here it's from the irreplaceable @sammyroth.bsky.social visiting the LA Auto Show:
www.climatecoloredgoggles.com/p/finding-am...

Finding America at the LA Auto Show

I spent the day counting EVs and marveling at the auto industry's marketing genius.

www.climatecoloredgoggles.com

Katharine Hayhoe @katharinehayhoe.com · 11h

You completely misinterpreted what we were talking about. If you were listening to the interview, you’d know we were talking about science in the United States.

You’re also wrong about climate change. Please update your understanding here before commenting again and do not misquote me. Thank you.

Are we really doomed?

Is it too late to do anything about climate change?

open.substack.com

Reposted by Katharine Hayhoe

lani ritter hall @laniritterhall.bsky.social · 15h

So good to read @billmckibben.bsky.social as guest editor on
@katharinehayhoe.com recent newsletter!

mailchi.mp/efe6d2ba878b...

A climate reality check from Bill McKibben

mailchi.mp

Reposted by Katharine Hayhoe

Sammy Roth @sammyroth.bsky.social · 15h

At last month's LA Auto Show, Volkswagen found the perfect marketing hook for its gas-guzzlers: the Los Angeles wildfires. Yes I am not kidding.

Also, I counted electric vehicles on the show floor and was (mostly) not encouraged.

Wrote more here: www.climatecoloredgoggles.com/p/finding-am...

Now free to read: Finding America at the LA Auto Show

I spent the day counting EVs and marveling at the auto industry's marketing genius.

www.climatecoloredgoggles.com

Reposted by Katharine Hayhoe

David John Gagne II @djgagnedos.bsky.social · 1d

Even after the news last week, we are still doing great research here at NCAR. My group has released a new paper, led by John Schreck, on arxiv about an efficient method for generating calibrated AI weather ensembles with reproducible scale specific perturbations. arxiv.org/abs/2512.18815

Controllable Probabilistic Forecasting with Stochastic Decomposition Layers

AI weather prediction ensembles with latent noise injection and optimized with the continuous ranked probability score (CRPS) have produced both accurate and well-calibrated predictions with far less ...

arxiv.org

Katharine Hayhoe @katharinehayhoe.com · 1d

Thank you Marshall! Merry Christmas ☺️

Reposted by Katharine Hayhoe, Julie L. Lockwood

Marshall Shepherd @drshepherd2013.bsky.social · 1d

Some thoughts to prepare Scientists for future headwinds in 2026...Mentions my friend Katharine Hayhoe

Read at:
www.forbes.com/sites/marsha...

--

Katharine Hayhoe @katharinehayhoe.com · 2d

I do too! 😍

Katharine Hayhoe @katharinehayhoe.com · 2d

I’m sorry I can’t do DM’s. www.katharinehayhoe.com/contact/

Contact Dr. Katharine Hayhoe

Do you have a climate question, resource inquiry, or event invitation? If it's not already covered by my FAQs, you can submit it here!

www.katharinehayhoe.com

Katharine Hayhoe @katharinehayhoe.com · 2d

See starter packs 1-8 below!

Katharine Hayhoe @katharinehayhoe.com · 4d

Did you know climate work attracts Katharines? 116 of us on Bluesky alone!

(This pack includes all creative spelling variations although the original has two A’s, deriving from the Greek καθαρός 😊)

This is Day 8 of my 20 days of Climate Starter Packs. For the previous entries please see below ⬇️

Reposted by Katharine Hayhoe

Eos @eos.org · 2d

We already knew that climate change is likely making tropical cyclones stronger. But new research suggests warming could also make the precursors to these storms more intense.

Warming May Make Tropical Cyclone “Seeds” Riskier for Africa - Eos

Intensified hurricane precursors may linger longer over the continent, worsening extreme flooding hazards.

eos.org

Katharine Hayhoe @katharinehayhoe.com · 2d

Day 9 of my 20 days of climate starter packs features professionals who study, work, or write at the intersection of climate, pollution, and health-related issues, from extreme heat to infectious diseases. (not mental health, that's another pack - coming tomorrow)

See below for previous days!

Katharine Hayhoe @katharinehayhoe.com · 2d

Not for climate science. 🙄

Katharine Hayhoe @katharinehayhoe.com · 3d

PS. If you want snow right now go to Lake Louise or Revelstoke. 5 metres of snow so far this year. Climate change gives you a few bigger wins along with the terrible losses … but the odds aren’t great.

Katharine Hayhoe @katharinehayhoe.com · 3d

😄

Reposted by Mónica Medina

Katharine Hayhoe @katharinehayhoe.com · 3d

I’ve watched at least two dozen reels, showing the terrible snow conditions in Colorado and Europe right now.

Guess how many of those videos mentioned climate change? And how many mentioned chemtrails?

The same number. ONE. 😱

The most important thing you can do to fight climate change: talk about it

How do you talk to someone who doesn't believe in climate change? Not by rehashing the same data and facts we've been discussing for years, says climate scientist Katharine Hayhoe. In this inspiring, ...

www.ted.com

Katharine Hayhoe @katharinehayhoe.com · 3d

Did I make the family dress up in historical outfits and go dancing at Mount Vernon tonight as our Christmas outing? Why yes I did and a good time was had by all 😄

A picture of fireworks over George Washington’s Mount Vernon tonight.

Katharine Hayhoe @katharinehayhoe.com · 4d

Added!

Katharine Hayhoe @katharinehayhoe.com · 4d

I love it! 🥰

Katharine Hayhoe @katharinehayhoe.com · 4d

Obviously! 😄

Reposted by Katharine Hayhoe, Nancy Knowlton

Tim Morton @timmorton2.bsky.social · 4d

“Last year more than 40% of electricity generation on Christmas Day came from renewables. It stood at 1.7% in 2009” #GreenSky #GreenShoots
“An extra 2 gigawatts of #wind and 3GW of #solar power came on to the network in 2025” @katharinehayhoe.com @350.org

www.theguardian.com/environment/...

This year’s Christmas could be Britain’s greenest yet, energy operator says

System operator Neso predicts lowest carbon intensity ever on Christmas Day after new wind and solar power come online

www.theguardian.com

Katharine Hayhoe @katharinehayhoe.com · 4d

Thank you for this. A few external thoughts here. bsky.app/profile/kath...

Katharine Hayhoe @katharinehayhoe.com · 6d

Since this op-ed specifically cites the example of other countries let me remind you that Canadian liberals' decades-long attempt to reconcile with the oil and gas industry and the province of Alberta have yielded no benefits for climate whatsoever and I'm not aware of any economic benefits either.

Opinion | Obama Supported It. The Left in Canada and Norway Does. Why Don’t Democrats?

www.nytimes.com

Katharine Hayhoe @katharinehayhoe.com · 4d

😄😄😄

Katharine Hayhoe @katharinehayhoe.com · 4d

Maybe the last section in my newsletter this week will help?

3 creative ways to use green energy

Green energy innovations, emergency briefing sounds alarm, and how to help with holiday travel

www.talkingclimate.ca

Katharine Hayhoe @katharinehayhoe.com · 4d

See below for the first seven days...and Katharines, if you are suddenly followed by a flood of people please do not feel they are weirdos + block because they are following so many other K's; they are just subscribers to this starter pack! (that has happened in the past 😳)

bsky.app/profile/kath...

Katharine Hayhoe @katharinehayhoe.com · 5d

One the first set climate research centers, labs & groups joined Bluesky, the next group came fast: so I needed a Part 2.

Here's the 2nd list of official organizations who made the move to bluer skies. Choose a few to follow or click the whole list!

Day 7 of my 20 Days of Climate Starter Packs.

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