Heat advisory issued Thursday for most of Oklahoma as temperatures climb

A heat advisory is in effect for Thursday for most of Oklahoma as temperatures are expected to be near 100 degrees in central Oklahoma.

The heat advisory is for 1 p.m. to 9 p.m. for most of the state from just west of Interstate 35 east to the Arkansas border as humidity is expected to increase the heat index for the eastern half of the state.

The high temperature in Oklahoma City Thursday will be near 99 degrees with a heat index up to 106 degrees.

On Wednesday in Oklahoma City, nine people were treated for heat-related complications, said a spokeswoman for the Emergency Medical Services Authority.