Data from oceans, ice and the air all point to the same thing: rising invisible heat. What experiments are working, and what kinds of trials do we need to stop?

A dramatic “roll cloud“ spotted up and down the country’s central coast formed during a weeklong heat wave.

Cloud Tsunami A viral video making its rounds on social media shows geachgoers in Portugal encountering an enormous and ...

A “roll cloud” spotted off the coast of Portugal looked like something out of a movie. Here’s the science behind it.

The rare arcus cloud, which is very similar to a tsunami, was seen by beachgoers who looked on as the sky turned dark and ...

People enjoying the sunshine at a beach were shocked when they witnessed a rare 'tsunami roll' that looked like it was 'out ...

Seventeen of the 27 major cities in Italy have experienced a heatwave this week, including Milan, Rome and Trento in the ...

The dark, tsunami-like cloud formation billowed across parts of Portugal’s northern and central coasts, as the country set a ...

A rare roll cloud was seen passing over several beaches in Portugal on Sunday, June 29. The phenomenon features a cloud that ...

These are the countries with extreme heat warnings in place right now. Plus, what travel insurance does and doesn't cover.

A rare roll cloud appeared over Portugal’s coast, surprising beachgoers as strong winds hit during an ongoing extreme ...