National Weather Service Warns of Increased Heat-Illness Risk in Oklahoma
Heat-related illnesses increase significantly during extreme heat and high humidity events, according to the National Weather Service Norman OK.
2 reports on this incident · first at Aug 18, 2026, 5:47 p.m. ET
Hazard products are revised and cancelled as conditions change. Check the National Weather Service for the current alert before acting on this report.
We last searched for new coverage of this at Aug 18, 2026, 12:41 p.m. ET — checked 6h ago.
Earlier reports
Aug 18, 2026, 5:47 p.m. ETFirst report
Extreme Heat Warning in Force for 28 Oklahoma Counties Wednesday, 11 AM to 8 PM CDT
An Extreme Heat Warning covers portions of central, east central, northern, southeast, and southern Oklahoma on Wednesday, August 19, 2026, according to the official warning product issued by the National Weather Service Norman OK at 11:32 AM CDT on August 18, 2026.
That record carries the headline "EXTREME HEAT WARNING IN EFFECT FROM 11 AM TO 8 PM CDT WEDNESDAY." The warning begins at 11:00 AM CDT on August 19, 2026, and ends at 8:00 PM CDT the same day. The same product describes an earlier Extreme Heat Warning running until 8 PM CDT the evening it was issued, with dangerously hot conditions and heat index values up to 110 for both periods.
The weather service record puts 28 zones under the warning. The counties listed are Grant, Kay, Garfield, Noble, Kingfisher, Logan, Payne, Canadian, Oklahoma, Lincoln, Grady, McClain, Cleveland, Pottawatomie, Seminole, Hughes, Stephens, Garvin, Murray, Pontotoc, Coal, Jefferson, Carter, Johnston, Atoka, Love, Marshall, and Bryan. Cities named in the warning area include Blackwell, Coalgate, Thackerville, Sulphur, Norman, Perry, Stillwater, Wewoka, Wakita, Madill, Davenport, Seminole, Wellston, Davis, Kingston, Stroud, Meeker, Marietta, Pauls Valley, Lamont, Prague, Holdenville, Blanchard, Ardmore, and Duncan.
On the danger, the record states that heat related illnesses increase significantly during extreme heat and high humidity events. The National Weather Service advises drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking up on relatives and neighbors.
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Revision history
- Version 118 Aug 2026, 21:59current
First published.
- Version 118 Aug 2026, 21:47current
First published.
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