More severe weather is expected in the Southern Plains Monday as residents in Oklahoma survey the destruction from tornado-spawning storms that injured at least 11 people and leveled homes over the weekend.

Severe thunderstorms will continue to batter the Southern Plains overnight and ramp up again Monday for northern Texas, western Arkansas, southwestern Missouri and most of Oklahoma. Areas including Oklahoma City could see more twisters.

While the ongoing storms will eventually weaken Monday morning, severe weather conditions are expected to ramp up in parts of the region during the day and could last into the evening –– threatening many of the same areas that have been battered by tornadoes and flooding over the weekend.

“Scattered severe thunderstorms, associated with tornadoes, large hail, and wind damage, are likely on Monday and Monday night from the Southern Plains north northeastward into the Ozarks and mid Mississippi Valley,” the Storm Prediction Center (SPC) warned. “A few of the tornadoes could be strong.”

A lower threat of severe storms will spread from central and eastern Texas to western Illinois – including the cities of Dallas, Houston, Austin, and St. Louis – threatening damaging wind gusts, large hail and tornadoes, according to the SPC.

Heavy downpours could also inundate streets. More than 7 million people are under flood watches across northern Texas, most of Oklahoma, southeastern Kansas, northwestern Arkansas and southern Missouri.

At least five tornadoes, combined with intense flooding from heavy rainfall, ripped through parts of Oklahoma late Saturday into Sunday –– destroying homes and other structures.

Video of the damage from CNN affiliate KOCO shows cars overturned and whole houses shredded. The storms toppled telephone poles and snapped trees in half. Debris is scattered around impacted areas, including large pieces of wood and metal from buildings that were ripped apart.

Nearly 40 structures were destroyed in the Oklahoma City area, the Oklahoma City Fire Department said in a Facebook post. Another 43 structures sustained major damage, while 54 had minor damage

At least 11 people were taken to hospital with non-life-threatening injuries, OCFD said Sunday night, adding that several others sustained minor injuries but declined to seek medical help.

Oklahoma Gov. Kevin Stitt has issued an emergency declaration for six counties. Officials were working to ensure that polling stations across the state would have power ahead of the presidential election Tuesday, Stitt said in a news conference Sunday.

“We’ll advise the public if there’s any issue there with the polling stations and reroute people if need to,” the governor said. More than 16,000 electricity customers in Oklahoma and Texas were still without power Sunday night, according to PowerOutage.US.

Stitt warned that potential life-threatening conditions will move across the state. “Utility restoration is underway where conditions permit and the state is working closely with local partners to make sure Oklahomans have what they need,” he said in a post on X.

The five tornadoes the National Weather Service has confirmed so far include two believed to have been powerful EF-3 twisters, one in Harrah and another near Sooner Road in Cleveland and Oklahoma counties. Tornado strength is measured using the Enhanced Fujita Scale or EF Scale, which rates tornadoes from EF-0 to EF-5 based on estimated wind speeds and related damage.

Most of the tornadoes hit during the dark overnight hours, with residents waking up to splintered buildings and trails of debris.