An Excessive Heat Warning has been issued for today and tomorrow, per the US National Weather Service Chicago Illinois. Oppressive heat and humidity is expected with peak heat indices, or 'feel like' temperatures, at or above 100 degrees. Limit time outside and take frequent breaks indoors or in the shade and hydrate. Check on relatives and neighbors. Children and pets should NEVER be left unattended in vehicles.
Find out more about the warning signs and symptoms of heat related illnesses from the Center for Disease Control and Prevention.