WWUS74 KTSA 211914 NPWTSA Heat Advisory National Weather Service Tulsa OK 214 PM CDT Fri Aug 21 2026 ARZ129-219-220-229-OKZ055>057-059>062-064-066>068-070-071-074-172-176-272-276-354 /O.CON.KTSA.HT.Y.0041.000000T0000Z-260822T0100Z/ North and Central Sebastian-Southern Crawford-Central and Southern Franklin-Southern Sebastian-Washington-Nowata-Craig-Pawnee-Tulsa-Rogers-Mayes-Creek-Okmulgee-Wagoner-Cherokee-Muskogee-McIntosh-Haskell-Northern Sequoyah-Northern Le Flore-Central and Southern Sequoyah-Central Le Flore-Southeast Osage ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... * WHAT...Heat index values up to 105. * WHERE...Portions of northwest and west central Arkansas and east central, northeast, and southeast Oklahoma. * WHEN...Until 8 PM CDT this evening. * 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..