2004 Chevy Cavalier electircal cooling fan

Dear Sir,
The electrical cooling fan in my car keeps running
for about 10 minutes even after I have placed the car in the Park gear and removed the key ffrom the
ignition from my car. Recently, the weather in my
neighborhood has been over 100 degrees Fahrenheit
for the past two weeks. Is the hot weather causing this problem, and is it normal for the electrical cooling fan to stay on even though the engine to the car is off? If this is not a normal situation, please tell me how to fix this problem so that the electrical cooling
fan will turn off when the engine is off. Thank you very much for your help. Sincerely, Vince