09/04/2026
US National Weather Service Chicago Illinois - ere's a map of heat headlines valid through this evening (current expiration time of 10 PM CDT) with a Heat Advisory across northern Illinois and northwest Indiana, except Boone, McHenry, Lake IL, northern, and central Cook Counties, where the advisory was canceled earlier today.
Now that we're finally getting past the lingering effects of the thunderstorm related outflow (and gusty easterly winds in northern Illinois), the current headline configuration should be a reasonable representation of where the most uncomfortably hot and humid conditions will be found the rest of the day and into the evening.
[1:24 PM CDT Friday 9/4/2026]
Here's a map of heat headlines valid through this evening (current expiration time of 10 PM CDT) with a Heat Advisory across northern Illinois and northwest Indiana, except Boone, McHenry, Lake IL, northern, and central Cook Counties, where the advisory was canceled earlier today.
Now that we're finally getting past the lingering effects of the thunderstorm related outflow (and gusty easterly winds in northern Illinois), the current headline configuration should be a reasonable representation of where the most uncomfortably hot and humid conditions will be found the rest of the day and into the evening.
