WWUS74 KTSA 271609 NPWTSA Extreme Heat Warning National Weather Service Tulsa OK 1109 AM CDT Mon Jul 27 2026 ARZ129-219-220-OKZ055>058-060>062-066-067-070-071-074-176-272 /O.CON.KTSA.XH.W.0006.260727T1700Z-260728T0100Z/ North and Central Sebastian-Southern Crawford-Central and Southern Franklin-Washington-Nowata-Craig-Ottawa-Tulsa-Rogers-Mayes-Okmulgee-Wagoner-Muskogee-McIntosh-Haskell-Northern Le Flore-Central and Southern Sequoyah ...EXTREME HEAT WARNING IN EFFECT FROM NOON TO 8 PM CDT TUESDAY... ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... * WHAT...For the first Extreme Heat Warning, dangerously hot conditions with heat index values up to 110 expected. For the second Extreme Heat Warning, dangerously hot conditions with heat index values up to 112 expected. * WHERE...Portions of northwest and west central Arkansas and east central, northeast, and southeast Oklahoma. * WHEN...For the first Extreme Heat Warning, until 8 PM CDT this evening. For the second Extreme Heat Warning, from noon to 8 PM CDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes..