A brutal heat wave across the eastern United States trapped millions of people in sweltering air this week with record-high temperatures.

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

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

Heat maps generated by eye tracking have gained a major popularity over the years. This is partly since they are easy to create and can effectively produce a data summary that is easy to understand.

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.