There was a risk of flooding in Oklahoma City, Norman, and surrounding areas early on September 1, the National Weather Service said, after heavy downpours and thunderstorms overnight.
This footage, filmed by Brian Michael, shows lightning in the Norman area. Local reports said 7,200 people in Oklahoma City and 1,200 people in Norman were without power early on September 1.
A tornado warning was also issued for parts of the state. Credit: Brian Michael via Storyful