The strongest signal of our changing climate flares while most of us are asleep.

Forecasters described it as a ‘historical weather day.’ An atmospheric scientist who was at the heart of the storms explains what happened.

Powerful winds hit a large part of the US, fueling tornadoes in Iowa, fires in Kansas and hurricane-force gusts in Colorado. An atmospheric scientist who was in the storms explains what happened.

Take a closer look at what’s driving climate change and how scientists know CO2 is involved, in a series of charts examining the evidence in different ways.

Which is worse, dry heat or wet heat? Both, says an exercise physiologist.

The US is shifting to a new set of climate 'normals' – data sets averaged over the past 30 years. But normal is a relative concept in a time of climate change.

Groundwater was once thought to buffer streams from warming, but an inexpensive new technique shows streams fed by shallow groundwater may be just as susceptible as those without.

Climate models are likely underestimating the true severity of future warming in urban areas.

Pikas – small cousins of rabbits – live mainly in the mountainous US west. They've been called a climate change poster species, but they're more adaptable than many people think.

There were so many tropical storms in 2020, forecasters exhausted the list of names and started using Greek letters. And that's only one reason 2020 was extreme.