Obviously, this tornado staying on the ground for 17 miles in such an area is the reason for these damage totals.
https://dfw.cbslocal.com/photo-galleries/2019/10/20/dfw-weather-tornado-damage-in-dallas-county/
Thousands of homes and businesses were without power in East Texas on Monday after severe storms near Dallas ripped off roofs and downed power lines, part of a violent storm system that also left four people dead in Oklahoma and Arkansas.
At least one tornado was confirmed to have touched down in northern Dallas on Sunday evening, the National Weather Service said.
Monday afternoon, Texas Gov. Greg Abbott issued a disaster declaration for 16 counties.
No deaths or serious injuries were reported in or near Dallas, the city said in a news release early Monday. Fire-Rescue spokesman Jason Evans told the Associated Press, though, that three people were hospitalized with non-life-threatening injuries.
https://www.usatoday.com/story/news/nation/2019/10/21/dallas-tornado/4050808002/
h/t FeedYourHead