The storms caused "extensive damage to residential and commercial properties," and knocked down power lines, traffic lights, and trees throughout the area, the fire department said. By Sunday night, more than 17,000 people were without power — down from the nearly 82,000 people left in the dark Sunday morning, according to poweroutage.us.

Severe storms and reported tornadoes overnight in Oklahoma ripped roofs off buildings and left more than 90,000 homes and businesses without power. Authorities said Sunday that at least six people were taken to hospitals with injuries that were not life-threatening.