Excessive Heat in Sequoyah, Oklahoma

A ridge of high pressure in the middle and upper atmosphere developed over the south central United States during late June. Unseasonably hot afternoon temperatures reaching the upper 90s, combined with unseasonably high humidity, resulted in heat index values in the 110 to 115 degree range across portions of eastern Oklahoma on the 24th through the 25th. At least ten people were treated for heat-related issues in Tulsa, five of which were transported to the hospital.