An Excessive Heat Warning is in effect Tuesday from 10 a.m. until 8 p.m. for Lauderdale, Clarke, Neshoba, Newton, Jasper, Jones, Kemper, Winston, Noxubee, Scott, Smith, and Leake counties in Mississippi and from 7 PM Monday until 9 PM Tuesday for Sumter, Marengo, Greene, Hale, and Pickens counties in Mississippi.
A Heat Advisory is in effect for Wayne County, Miss. and Choctaw County, Ala. until 7 p.m. Tuesday.
Dangerous heat is likely to stress our bodies to dangerous levels. Be sure to drink lots of water to stay hydrated. We can become dehydrated easily and quickly in this heat. It's also important to take frequent cool breaks. Know the signs of heat exhaustion and heat stroke, and if you recognize those signs you should seek medical assistance.
This evening, temperatures will ease back from near 100 degrees around 5 PM. We aren't likely to cool from 90s to 80s until around 9 p.m. Most of tonight will stay in the 80s with only a brief period of upper 70s around sunrise Tuesday. Those upper 70s will become 80s by 8 a.m. and then 90s before 10 a.m. Our high temperatures will be near 100 degrees Tuesday afternoon.
The heat index is the other half of our story. The heat index will be over 100 degrees from 10 AM through 8 p.m. Tuesday. The heat index will max out around 110-115 degrees during the middle and late afternoon.
A cold front will bring an increase in scattered showers and thunderstorms on Wednesday. That will provide some relief and knock temperatures down by up to 10 degrees - cooler near the rain. Warming through the low-to-mid 90s is likely Thursday through Sunday, though the humidity will be lower so heat indices will be closer to 100 degrees rather than 110.