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The Harvard Climate Brief brings expertise on climate change and sustainability to the wider world. Authors’ views are their own. Republish.

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hot sun in the city

When heat hits home: Climate change’s hidden and deadly toll

Buildings, housing conditions, and access to cooling shape the health risks of extreme heat. A study from Boston shows how the cost of buying and running air conditioning can leave high-risk residents without protection.
Health
Mon, Aug 10, 2026
hand blocking sun

When a heat wave is coming, who is most at risk?

A free new tool makes cutting-edge data streams available to anyone, helping planners map where extreme heat, health risks, and vulnerability collide – block by block.
Health
Wed, Jul 29, 2026

Will the AMOC slow? Collapse? Four ways scientists study the Atlantic current

The Atlantic Meridional Overturning Circulation is likely to weaken. But there will be no certainty without decades more ocean data.
Climate Explained
Tue, Jul 7, 2026
child flood

Climate anxiety is real. That does not make it a diagnosis

A child psychiatrist explains why distress over climate change should not be reduced to individual pathology.
Health
Mon, Jun 29, 2026
El Nino sat image by NOAA

How we came to understand El Niño

For centuries, farmers, fishermen, and forecasters saw pieces of the same climate pattern. Modern observations revealed how a warming Pacific can reshape weather around the world. Now global warming is making some of those effects harder to predict.
Climate Explained
Mon, Jun 22, 2026
coastal village in Côte d’Ivoire

Africa’s rising seas, mapped and measured coast-to-coast

A new tool lets users click anywhere on Africa’s shoreline to visualize how sea level has changed since 1900, what forces are driving the accelerating change, and how much more to expect by 2100.
Climate Adaptation
Mon, Jun 15, 2026
Maine forest

The old forests nobody knew were there

Hidden in northern Maine, newly revealed old forests store vast amounts of carbon. But most remain unprotected on private timberland.
Biodiversity Carbon Pricing
Mon, Jun 8, 2026
May’s heatwaves offer early warning for workers

May’s heatwaves offer early warning for workers

As cities prepare for hotter summers, protecting people on the job will require enforceable rules, local action, and workers’ voices.
Health Law & Policy
Thu, Jun 4, 2026

All perspectives expressed in the Harvard Climate Brief are those of the authors and not of Harvard University or the Salata Institute for Climate and Sustainability. Any errors are the authors’ own. The Harvard Climate Brief is edited by an interdisciplinary team of Harvard faculty.