Dangerous heat and humidity will continue through Wednesday, with peak heat index values over 105°F. Heat-related illnesses may develop in fewer than 30 minutes after strenuous outdoor activity. The heat should break toward the end of the week.

High temperatures and humidity can pose a health and safety threat. To request a well-being check for someone who may be suffering from the heat call 9-1-1. A Cooling Site is an air-conditioned facility where residents can go to find relief from extreme heat. During business hours, Elmhurst City Hall and the Elmhurst Public Library are designated Cooling Centers within Elmhurst. For a full list of Cooling Sites in DuPage County, visit dupagecris.org.