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, the Elmhurst Police Station, and the Elmhurst Public Library are designated Cooling Centers within Elmhurst. For a full list of Cooling Sites in DuPage County, visit dupagecris.org.