Severe storms and tornadoes ripped through Oklahoma early Sunday, tossing cars and blowing roofs off buildings and leaving nearly 86,000 homes and businesses without power in the middle of the night. Authorities said at least six people were injured.

The extent of the damage became clearer with daylight following strong storms that hit the state’s capital, Oklahoma City, throughout the night and triggered tornado warnings extending towards the Arkansas border. Local television footage showed downed power lines, uprooted homes, overturned vehicles and neighborhood streets filled with debris.

Oklahoma City Police Department Capt. Valerie Littlejohn said at least six people were transported to hospitals with non-life-threatening injuries.

Authorities in the small Choctaw town just outside Oklahoma City said a tornado hit a neighborhood shortly after midnight. Firefighters and police officers went door-to-door to obtain information about injuries, and authorities opened an elementary school gym as a shelter, according to the Choctaw Police Department.

“There is significant damage to homes in the area,” the ministry said on Facebook.

Flooding occurred in some areas and a fire broke out in a house as a result of a lightning strike.

The Oklahoma Department of Emergency Management said several shelters were available for displaced residents or those without power, including one opened by the American Red Cross at a casino.

It was stated that floods occurred in some areas due to heavy rainfall, and a house caught fire as a result of a lightning strike.

Southern Oklahoma Heart Hospital was also damaged, state health officials said.

Crews rescued two people trapped in an overturned trailer, the Oklahoma City Fire Department said in a Facebook post early Saturday.

At the University of Oklahoma, school officials urged students and staff to seek shelter and move to the bottom floor as the storm approached campus after midnight. The National Weather Service office in Norman also issued urgent warnings on social media, saying: “If you are in the path of this storm, take cover now!”

Parts of Oklahoma remained at risk for heavier rainfall and thunderstorms later Sunday.