Sheriff: 7 Still Unaccounted For After Tornado

A North Texas county sheriff says seven people remain unaccounted for after a massive tornado claimed six lives.

Hood County Sheriff Roger Deeds says emergency responders are searching parts of Granbury that were left devastated. Deeds says authorities are working to identify the six adults who died in last night's twister in Granbury, about 40 miles southwest of Fort Worth.

Deeds earlier said 14 people were missing but half were later found with family or friends. Deeds says he hopes that will be the case for the other seven missing people.

He says 37 people were treated at a Granbury hospital and of those, 15 were transported to Fort Worth-area hospitals and 19 were treated and released.

The powerful storm crushed buildings as it tore through the area, leaving some as just piles of planks and rubble. Trees and debris were scattered across yards, and fences were flattened.

Video of the storm from Paige Burress:

Forecasters say the tornado that claimed six lives and destroyed dozens of homes in North Texas is believed to have had winds up to 200 mph.

The National Weather Service said the preliminary storm estimate for Wednesday night's tornado in Granbury was an EF-4, based on the Fujita tornado damage scale. That means the storm carried wind speeds of 166 mph to 200 mph.

The NWS believes 10 tornadoes raked North Texas in a violent system, including the one in Granbury, about 40 miles southwest of Fort Worth. Other tornadoes damaged nearby Cleburne and Millsap.