The National Weather Service in St. Louis has issued an Excessive Heat Warning for much of Missouri, starting at 1 p.m. Wednesday and extending through 8 p.m. Saturday.
With high temperatures forecast in the upper 90s, the NWS expects a heat index of up to 113 degrees Fahrenheit.
The warning area includes Cole, Boone, Callaway, Moniteau and Osage counties in Mid-Missouri, among other counties in Missouri and Illinois.
An Excessive Heat Warning means a prolonged period of dangerously hot temperatures and high humidity is expected — conditions that can quickly cause heat stress or heat stroke, according to the NWS.
The NWS advises that people in the warning area avoid poorly ventilated areas and prolonged work in the sun.
People whose homes do not have air conditioning are advised to ventilate their houses or apartments with fans and to spend some time in an air-conditioned environment to give their bodies a break from the heat.
People who must work outside should wear lightweight and loose-fitting clothing, drink plenty of water, and schedule frequent rest breaks in shaded or air-conditioned environments.
Car interiors can reach lethal temperatures in a matter of minutes during periods of excessive heat, the NWS notes.
In Jefferson City, there are cooling centers at:
In Callaway County, there are cooling centers at:
In Moniteau County, there are cooling centers at:
In Osage County, there are cooling centers at: