Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

Remote-sensing data and artificial intelligence are mapping the most heat-vulnerable buildings in cities like Delhi, in an effort to target relief from extreme temperatures at a granular level.

Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

A heat wave is currently affecting about 160 million people, according to the National Weather Service. Here's which states feel the hottest.

More than half the country, including Illinois, is currently in a heat dome. Here's what that means and how to stay safe during excessive heat.

Heat indexes are expected to remain above 100 for the next few days throughout Illinois. Find out when it will cool off.

A heat wave is blanketing Delaware today and will last several days. When is relief on the way? Here's the latest forecast.

At least nine states along the East Coast faced summer swelter on Monday, and the steamy weather is expected to persist on Tuesday.

Blazing temperatures scorched several states on Tuesday, as about 80,000 residents faced power outages.

According to Met Office weather maps, temperatures of up to 34C are expected to hit the UK on Monday 30 June, around 4pm in the afternoon.

It's all part of a "heat dome" on the East Coast that could send temperatures to 100 degrees in Boston Tuesday. An extreme heat warning is in effect for much of Massachusetts.