Most of America's Lower 48 states are about to swelter under an unusually large, strong and long-lasting heat dome.
Extreme heat is considered the deadliest weather-related hazard in the U.S., according to the Fifth National Climate Assessment. About 2,000 Americans die each year on average from extreme heat, according to the CDC.
In July 1995, a historic heat wave left more than 700 people dead. ABC7 is looking back on how the tragedy changed the way Chicago responds to natural disasters and led to a major emergency services system overhaul.
When temperatures rise in Chicago, for some, it brings back difficult memories and prompts a call for action to prevent heat-related deaths.
A mother has been arrested and charged after the child was left strapped in a car seat in sweltering conditions.
The Chicago area is undergoing another day of extreme heat Monday.