4th Of July Heat Advisory, Heat Index Of 105 For Illinois

If you're spending any time outside for the Fourth of July, you will want to have air conditioning or a way to keep cool close at hand. A heat advisory began at noon and has been extended until 8 p.m., according to the National Weather Service. The advisory is in effect for most of Illinois including: Winnebago, Boone, McHenry, Ogle, DeKalb, Kane, DuPage, Kendall, Grundy, Will, Kankakee and Iroquois counties.

According to the National Weather Service, temperatures on the Fourth of July will be around 90 degrees, and peak afternoon heat indices will bring that up to near 105 degrees. The combination of heat and humidity will lead to hazardous conditions, particularly for the elderly and those with pre-existing health conditions.

The National Weather Service advises to drink plenty of fluids, stay in an air-conditioned room, stay out of the sun and check up on relatives and neighbors.

Here's a look at the forecast for the next few days:

TUESDAY: A 30 percent chance of showers and thunderstorms, mainly between 4 p.m. and 5 p.m. Partly sunny, with a high near 90. Heat index values as high as 97. Southeast wind 5 to 10 mph.

TUESDAY NIGHT: A 20 percent chance of showers and thunderstorms before 8 p.m. Partly cloudy, with a low around 73. East southeast wind around 5 mph.

Independence Day: A 40 percent chance of showers and thunderstorms, mainly after 1 p.m. Partly sunny, with a high near 89. Heat index values as high as 100. South southwest wind around 5 mph.

WEDNESDAY NIGHT: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75. South southwest wind around 5 mph.

THURSDAY: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. Southwest wind 5 to 10 mph becoming northwest in the afternoon.

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