* WHAT. For the first Excessive Heat Warning, dangerously hot conditions with heat index values up to 116. For the second Excessive Heat Warning, dangerously hot conditions with heat index values up to 112 expected. * WHERE. Portions of southeast Arkansas, northeast Louisiana, and central, north central, northwest, southwest, and west central Mississippi. * WHEN. For the first Excessive Heat Warning, until 8 PM CDT this evening. For the second Excessive Heat Warning, from 10 AM to 8 PM CDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. For the Excessive Heat Warning, dangerously hot conditions with heat index values up to 113. For the Heat Advisory, heat index values up to 109 expected. * WHERE. Portions of central, east central, north central, northeast, south central, southeast, and southwest Mississippi. * WHEN. For the Excessive Heat Warning, until 8 PM CDT this evening. For the Heat Advisory, from 10 AM to 8 PM CDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. For the Excessive Heat Warning today and Thursday, dangerously hot conditions with heat index values up to 115 degrees. * WHERE. Portions of central, north central, northeast, and southwest Mississippi. * WHEN. For both Excessive Heat Warnings, until 8 PM CDT each evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS. Dangerously hot conditions will continue to be possible through the middle of this week. Try to schedule outdoor activities for the cooler parts of the day.

* WHAT. For the Excessive Heat Warning today and Thursday, dangerously hot conditions with heat index values up to 115 degrees. * WHERE. Portions of southeast Arkansas, northeast Louisiana, and central, north central, northwest, southwest, and west central Mississippi. * WHEN. For both Excessive Heat Warnings, until 8 PM CDT each evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS. Dangerously hot conditions will continue to be possible through the middle of this week. Try to schedule outdoor activities for the cooler parts of the day.

* WHAT. For the Excessive Heat Warning, dangerously hot conditions with heat index values up to 115 degrees. For the Heat Advisory, heat index values up to 110 degrees expected. * WHERE. Portions of central, east central, northeast, south central, southeast, and southwest Mississippi. * WHEN. For the Excessive Heat Warning, until 8 PM CDT this evening. For the Heat Advisory, from 10 AM to 8 PM CDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS. Dangerously hot conditions will continue to be possible through the middle of this week. Try to schedule outdoor activities for the cooler parts of the day.