RUNAWAY BAY, Texas (AP) — A slow-moving severe thunderstorm produced a tornado that left at least one person dead in northern Texas and displaced at least 20 families, with many homes sustaining major damage, authorities said Sunday.

Emergency responders worked through Saturday night and Sunday in the town of Runaway Bay to clear debris in order to reach damaged homes and provide medical care where needed, Wise County Judge J.D. Clark, who serves as the county’s chief executive, told a news conference.

“Access has been difficult due to blocked roadways and downed utilities, but crews have continued pushing forward to reach those in need,” Clark said. “Roads in the affected area will remain closed by law enforcement to ensure safety and allow emergency crews to manage the scene without obstruction.”

The storm also hit Springtown, where Parker County Assistant Fire Chief David Pruitt told KXAS-TV that a person had died. Pruitt did not immediately respond to a phone and email message from The Associated Press.

National Weather Service teams confirmed that an EF-2 tornado with peak winds of up to 135 mph (217 kph) had touched down in the Runaway Bay area. They were still assessing damage in Springtown on Sunday afternoon.

The storm 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.