RUNAWAY BAY, Texas (AP) — A tornado-producing thunderstorm left at least two people dead in northern Texas and displaced at least 20 families, with many homes sustaining major damage, authorities said Sunday.

At least one person was killed and numerous homes were damaged Saturday night in the town of Runaway Bay, said Wise County Judge J.D. Clark, who serves as the county's chief executive. Emergency responders worked to clear debris to reach damaged homes and provide medical care where needed, Clark said.

"Access has been difficult due to blocked roadways and downed utilities, but crews have continued pushing forward to reach those in need," Clark said.

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The storm also hit Springtown, where Parker County Assistant Fire Chief David Pruitt said in an email that a second person died south of the city limits. There was "significant damage" in the area, Pruitt said.

"One of the most significant ongoing challenges is the widespread power outage affecting many residents," he wrote.

National Weather Service teams confirmed that an EF-2 tornado with peak winds of 135 mph (217 kph) touched down in the Runaway Bay area. An EF-1 tornado with peak winds of 105 mph (169 kph) was confirmed in the Springtown area, the weather service said.

The slow-moving supercell traveled through the area around 10 p.m. Saturday, said meteorologist Patricia Sanchez with the Fort Worth weather service office.

It moved southeast from around Wichita Falls, near the Oklahoma border, passing just west of Fort Worth. Runaway Bay is about 45 miles (72 kilometers) northwest of Fort Worth on Lake Bridgeport. Springtown is about 30 miles (48 kilometers) northwest of Fort Worth.

Weather service radar picked up a "potentially large and extremely dangerous" tornado near Azle at 10:14 p.m. Saturday. That's about another 10 miles (16 kilometers) southeast of Springtown.