Extreme heat will enter the area over the next several days. 

The National Weather Service is forecasting a high of 99 degrees Thursday in Algonquin. 

High temperatures then will hover near the 90-degree mark through the weekend, according to the weather service.

Lower-than-average rainfall coupled with the hot weather so far this year has caused drought-like conditions to develop throughout Illinois. At Chicago-O'Hare, 12.65 inches of rainfall has been recorded so far this year, compared with 22.56 inches of rainfall at this time last year. 

In northern Illinois, the conditions have been classified as abnormally dry, which is the least-severe rating on the U.S. Drought Monitor. 

As far as weather in Algonquin, here are more details on what to expect over the next several days:

• Thursday: Mostly sunny skies with a high near 99 degrees. There is a 20 percent chance of showers and thunderstorms at night.
• Friday: Mostly sunny skies and a high near 93 degrees during the day. 
• Saturday: Mostly sunny skies and a high near 92 degrees. There is a chance of showers and thunderstorms at night. 
• Sunday: A high of 90 degrees and mostly sunny skies during the day. There is a chance of showers and thunderstorms. 

Read More: Stay Safe: Hot Weather Tips