 Pulaski County is under a severe and excessive heat warning until 9pm this evening. The National Weather Service predicts heat index values could go as high as 113 degrees. The heat index is the measure of a temperature relative to humidity and an indicator of how hot it feels. The Central Arkansas Weather Service is recommending people stay in air-conditioned rooms with plenty of water. Plaintiffs in the legal challenge to Arkansas' congressional redistricting have decided not to appeal the case to the U.S. Supreme Court.