(CNN) – Tornadoes and flooding from powerful storms tore through parts of Oklahoma overnight, leaving at least six people injured and destroying homes and other property.

Residents of Oklahoma and Texas are bracing for more severe weather Sunday, including possible tornadoes, flash flooding, hail and strong winds. The National Meteorological Service issued warnings for parts of both states on Sunday afternoon.

The weather service has advised residents near Crowell, Texas to seek shelter during a severe thunderstorm winds up to 70 mph approached.

The severe weather is expected to move from west to east on Sunday, the weather service said.

Eleven people were taken to the hospital with non-life-threatening injuries after the overnight storms, said Scott Douglas, public information officer for the Oklahoma City Fire Department.

Several structures were damaged in the area, along with power lines, trees, gas lines, traffic signals and traffic signs, said Valerie Littlejohn, public information officer for the Oklahoma City Police Department.

As of 1:30 p.m. CST Sunday, 39 structures had been destroyed, according to Oklahoma City officials. Additionally, 43 structures sustained major damage, while 54 sustained minor damage.

More than 30,000 customers in Oklahoma and Texas were without power Sunday afternoon, according to the data PowerOutage.us. In Oklahoma City alone, 5,000 residents are without power, according to the city.

The teams of the National Meteorological Service are damage control Sunday, including in the city of Valley Brook, Harrah and Newcastle, where storms caused severe damage.

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

Around 1:20, the weather service ADVISED a severe storm with a tornado was moving through eastern Oklahoma City toward Midwest City and Tinker Air Force Base. A tornado warning was issued for more than 300,000 people in Moore, Midwest City and Del City.

“I was awake and I heard it pick up really fast,” Justin Cue said, describing the moment a possible tornado hit his father’s home overnight, leaving him with minor injuries from flying glass and debris.

“Santas started hitting the house and after a few seconds my window blew out and then all you could hear was the roar of the wind and the crunch of wood and glass breaking,” Cue told CNN.

Cue’s father, who moved to Oklahoma City from Kansas about two years ago, was also injured when the roof collapsed on him. “He was unconscious for a short period of time and we weren’t sure he was OK,” Cue said.

When the two were able to get out of the house around 1:30 a.m., Cue said neighbors were yelling and helping pull people out of the rubble until first responders arrived.

Tornadoes were reported just east of Oklahoma City, and tornado and thunderstorm warnings were in effect until early morning in the Oklahoma City area, weather service said.

“Folks, don’t let your guard down too much – we’re already starting to see the atmosphere begin to recover ahead of another round of storms, heavy rain, flooding and potential severe weather today,” the weather service said in a post on X.

The National Weather Service has issued a tornado watch for parts of Oklahoma and several northern Texas counties until Sunday at 8:00 PM CST. The watch includes Oklahoma City and surrounding cities in the Southeast, affecting more than two million people.

Thunderstorms with supercell electrical discharges are firing from the same front that caused damage overnight. These new storms are capable of producing a few tornadoes, ping-pong ball sized hail and damaging winds of 75 mph.

“Cells of intense thunderstorms over southwest Oklahoma and northwest Texas will quickly track northeast this afternoon into the watch area. Strong low-level shear will support the risk of tornadoes and damaging wind gusts with these storms,” according to the weather service’s Storm Prediction Center.

The Oklahoma Department of Emergency Management said they are monitoring severe weather.

The police are asking people avoid some roads in the area due to the breakdown.

First responders rescued two people trapped in an overturned mobile home after the storms hit, according to reports Oklahoma City Fire Department. They also responded to several vehicles that were flooded due to the heavy rains, according to Douglas.

The University of Oklahoma told students and staff at its Norman campus to “Take shelter NOW in the building you are in. Move to lowest floor/interior”.

Nocturnal tornadoes are twice as deadly as daytime ones, research shows. Nocturnal tornadoes are difficult to spot in the dark, and those sleeping may not be aware that danger is near.

Exist increased concern on this week’s tornado threat, given what a prolific year it has been for U.S. twisters. The number of tornadoes reported so far this year is the second highest on record, trailing only 2,156 in 2011.

Violent storms are most common in the spring and summer, but a second wave of dangerous storms and tornadoes occurs in the fall and winter as cold air from the north often collides with warmer, moist air coming out of the Gulf of Mexico.

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CNN’s Mike Madrigal and Elisa Raffa contributed to this report.