The National Weather Service in Norman, Okla., has extended a Heat Advisory already in affect through 10 p.m. Wednesday.
Heat index values are expected to range from 105 to 111.
Very hot afternoon temperatures will result in dangerous heat conditions through at least early Sunday evening. Cooler conditions can be expected during the morning. Expected morning temperatures are expected between 75 and 80 degrees.
Take extra precautions when while outside. Reschedule strenuous activities to early morning or evening hours. Know the signs and symptoms of heat stroke and heat exhaustion. Wear lightweight and loose fitting clothing when possible and drink plenty of water.
To reduce risk during outdoor work, schedule frequent rest breaks in a shaded or air-conditioned area. Anyone overcome by heat should be moved to a cool and shaded location. In case of heat stroke, call 911.