WWUS74 KTSA 150349 NPWTSA Heat Advisory National Weather Service Tulsa OK 1049 PM CDT Fri Aug 14 2026 OKZ055>064-066-067-070-154-254-354 /O.CON.KTSA.HT.Y.0035.000000T0000Z-260817T0100Z/ Washington-Nowata-Craig-Ottawa-Pawnee-Tulsa-Rogers-Mayes-Delaware-Creek-Okmulgee-Wagoner-Muskogee-Western Osage-Northeast Osage-Southeast Osage ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT SUNDAY... * WHAT...Heat index values up to 110 Saturday. Higher heat index values possible Sunday. * WHERE...Portions of east central and northeast Oklahoma. * WHEN...Until 8 PM CDT Sunday. * IMPACTS...Heat related illnesses are possible especially impacting those not acclimated to the conditions or those performing strenuous activities. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke..