Weather Alert Watch
Severe Extreme Heat Warning

Extreme Heat Warning for Winnebago; Boone; McHenry +21 more

What: Dangerously hot conditions with peak afternoon heat index values of 100 to 105 degrees expected. Impacts: Heat related illnesses increase during heat waves. Where: Portions of central, east central, north central, and northeast Illinois and northwest...

IL, INWinnebago; Boone; McHenry; Lake; Ogle; Lee; De Kalb; Kane; DuPage; La Salle; Kendall; Grundy; Kankakee; Livingston; Iroquois; Ford; Northern Will; Southern Will; Eastern Will; Lake; Porter; Newton; Jasper; Benton

Official alert brief

WHAT

Dangerously hot conditions with peak afternoon heat index values of 100 to 105 degrees expected.

WHERE

Portions of central, east central, north central, and northeast Illinois and northwest Indiana.

WHEN

Until midnight CDT /1 AM EDT/ Thursday Night.

IMPACTS

Heat related illnesses increase during heat waves.

ADDITIONAL DETAILS

Dangerous heat is expected to persist through Thursday. Thunderstorms may begin to bring some relief from the heat for portions of northern Illinois by Thursday afternoon or evening.

Instructions

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.