National Weather Service United States Department of Commerce

A heat wave continues for central and southeast Illinois, as highs reach the mid 90s for most of central IL through Saturday. Heat index values are expected to reach 100 to 110 each day. A heat advisory is in effect for Peoria, Bloomington, and Champaign and nearby areas, while the hotter areas to the southwest, including Springfield and Lincoln have an excessive heat warning in effect through Saturday. Occasional thunderstorms are possible through the period as several disturbances pass through the Great Lakes Region. Better chances for thunderstorms for most of central and southeast Illinois will be Friday and Saturday. Mostly sunny conditions and less hot temperatures in the upper 80s to around 90 following a cold frontal passage.
A dangerous heat wave is in progress for central and southeast Illinois through Saturday. NEVER leave children or pets in automobiles, even with windows open. Temperatures can be 30-40 degrees HOTTER inside the vehicle. Drink plenty of water or sports drinks to stay hydrated. Limit strenuous activities, and do them early or late in the day. Spend as much time as possible in the shade or air conditioned buildings. Check on elderly family, friends, and neighbors.