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

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.

Stay safe in this sweltering heat, New Jersey. Here's the latest today, from heat maps, advisories and warnings, to when we'll see relief.

Humidity will soon surge to extreme levels across 40 states. Find out where there will be excessive heat and humidity — and how humidity patterns are changing.

Gov. Gavin Newsom on Thursday announced the launch of a new, first-in-the-nation tool to forecast and rank heat severity in areas across California.

The heat will start rolling in today, and the high temperatures are getting higher in the latest forecast. Here's how hot it will get.

The weather later this week will give Ohioans the chance to test out their air conditioners. Here's how hot it will get when the heat wave sets in.

Dallas hopes new climate data can help shape strategies to combat the urban heat island effect that makes some areas 10 degrees warmer on hotter days.

Results of the largest single-day heat-mapping campaign in United States history showed that some parts of Houston were significantly hotter than others.

The H3AT coalition found communities to Houston's southwest like Gulfton, Alief, Sharpstown, Westwood, and Mid West faced the most heat stress.