Moderate Expected Likely Heat Advisory Heat Advisory issued July 17 at 12:40PM EDT until July 17 at 9:00PM EDT by NWS Raleigh NC Jul 17, 12:40 PM → Jul 17, 9:00 PM WHAT: Heat index values up to 109. WHERE: Cumberland, Durham, Harnett, Johnston, Sampson, Wake,Wayne, and Wilson Counties. WHEN: Until 9 PM EDT this evening. IMPACTS: Hot temperatures and high humidity may cause heatillnesses. + Read More Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check on relatives and neighbors. Updated: Jul 17, 5:20 PM Source: NWS Alert