Extremely hot summer days are dangerous. And when they’re followed by extremely hot nights, the health risks grow. Sweltering summer nights limit our ability to cool off from scorching summer ...

Global mean temperatures have risen by more than 1.3°C since 1850, and set a new record in 2023. The primary cause of this warming is rising levels of carbon dioxide in the atmosphere from ...

When hot summer days are followed by hot nights, the health risks grow. These combined hot summer day-night events are on the rise across the U.S. and around the globe.

Cities across the southern U.S. continue to grapple with extreme heat as temperatures reach severe highs made at least five times more likely because of climate change. Daily average ...

June 21 is #ShowYourStripes day — a time to spread awareness about climate change using the iconic ‘warming stripes’ graphics showing temperature trends over ...

Climate Matters enables data-driven climate reporting. We help a nationwide media network connect global climate change to local audiences in ways that matter. Climate Matters produces free weekly ...

Data updated daily on how climate change influences temperatures in 1,000 cities around the world. Available through mid-November 2022. Learn more about the Climate Shift Index ™ or view our ...

Helen is a Research and Communications Fellow with the Climate Matters Program. She recently graduated from Princeton University with a degree in Ecology and Evolutionary Biology and a certificate ...

What's the CSI scale? The CSI is a categorical scale, with the categories defined by the ratio of how common (or likely) a temperature is in today's altered climate vs. how common it would be in a ...