(KMOV.com) -- In case the heat was not enough, now there is a possibility of thunderstorms into Sunday afternoon.
On Saturday, area residents were sweltering in record setting heat. Saturday's high temperature topped 98 degrees.
A chance of storms will linger throughout Sunday with increased cloud cover bringing slightly cooler temperatures to the area. The highest rain chance is in the northern and eastern portions of the viewing area.
The National Weather Service has extended the heat advisory for the St. Louis area until 7 p.m. on Wednesday, June 8th.
Check out the latest forecast.
Saturday's extreme heat caused Busch Stadium officials, the St. Louis fire department and the police department to all work together to make sure Cardinals fans stay cool and hydrated at Saturday's game.
Joe Abernathy with Busch Stadium Operations said, "What we do at the ballpark when we have a heat advisory like this is we have an extra medical crew available to handle any heat related cases."
Heat also means big business for swimming pools. The Belleville, Illinois community pool reopened on Saturday after closing last summer when swimmers became sick. Belleville's director of Parks and Recreation said the pool is now safe and people are welcome to come cool off. Last summer, the parasite Cryptosporidium or "Crypto" was blamed for sickening more than 40 people.
Heat safety tips.