* WHAT. For the Excessive Heat Warning, dangerously hot conditions with heat index values up to 110. For the Heat Advisory, heat index values up to 109 expected. * WHERE. Baxter, Cleburne, Eastern, Central, and Southern Searcy County Higher Elevations, Marion, Newton County Lower Elevations, Northwest Searcy County Higher Elevations, Searcy County Lower Elevations, Southeast Van Buren County, Stone, and Northern Scott County Counties. * WHEN. For the Excessive Heat Warning, until 9 PM CDT this evening. For the Heat Advisory, from 11 AM to 9 PM CDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. For the first Excessive Heat Warning, dangerously hot conditions with heat index values up to 113. For the second Excessive Heat Warning, dangerously hot conditions with heat index values up to 113 expected. * WHERE. Portions of central, eastern, north central, southeast, and southwest Arkansas. * WHEN. For the first Excessive Heat Warning, until 9 PM CDT this evening. For the second Excessive Heat Warning, from 11 AM to 9 PM CDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT. For the first Excessive Heat Warning, dangerously hot conditions with heat index values up to 112. For the second Excessive Heat Warning, dangerously hot conditions with heat index values up to 113 expected. * WHERE. Conway, Northwest Yell County, Perry, Southern Pope County, Yell Excluding Northwest, Fulton, Izard, Southern Johnson County, Southern and Eastern Logan County, and Western and Northern Logan County Counties. * WHEN. For the first Excessive Heat Warning, until 9 PM CDT this evening. For the second Excessive Heat Warning, from 11 AM to 9 PM CDT Thursday. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events.