(KMOV.com) -- Triple-digit temperatures are expected to make an appearance on Monday with dangerous heat and poor air quality lingering through Tuesday afternoon.
Temperatures on Sunday topped out at 97 degrees with a heat index of 111 degrees, but temperatures on Monday are expected to be even hotter. The National Weather Service has issued a heat warning for the St. Louis metropolitan area including St. Louis and St. Charles counties in Missouri and St. Clair and Madison counties in Illinois. The counties that are not included in the warning are under a heat advisory.
Temperatures on Monday are projected to reach 101 degrees with a heat index of 115 degrees or higher. Besides the unbearable heat, the air quality will be unhealthy for people with special needs. Also, children and the elderly should limit their outside activity.
Area residents are urged to drink plenty of water and limit outside activity to morning and evening hours. Check on elderly relatives and neighbors to make sure they are doing well. Never leave children or pets in a vehicle even if the vehicle is running. More hot weather safety tips.
The St. Louis area will get a short reprieve from the heat Wednesday evening and into Thursday, but temperatures will climb to dangerous levels again for the following weekend.
Since a heat advisory has been issued, cooling sites will be activated to offer the general public air-conditioned relief and cool water during the hottest part of the day. To find the closest cooling site, call the United Way at 211, or click here.
The local charity 'Cool Down St. Louis' will also provide heat-related assistance. Call (314)241-7668 for more information.