Moderate Expected Likely Heat Advisory Heat Advisory issued June 11 at 12:20AM CDT until June 11 at 6:00PM CDT by NWS Norman OK Jun 11, 1:00 PM → Jun 11, 6:00 PM WHAT: Heat index values up to 107 expected. WHERE: Portions of central, east central, southern, southwest,and western Oklahoma and northern Texas. WHEN: From 1 PM this afternoon to 6 PM CDT 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 up on relatives and neighbors. Updated: Jun 11, 2:46 PM Source: NWS Alert