In 1999 the Moore Tornado was an F5 that hit Oklahoma City and its suburbs, later on the same system produced deadly tornados in the Wichita area. The scary thing is that today those two metro areas are going to be directly under the gun.
The tornado track was over 200 miles long.
An F5 hit Lubbock in 1970, 26 dead and 1500 injured. At one point the largest tornado was 1.5 miles wide.
Waco, which wouldn’t qualify as a metro area, was hit by an F5 in 1953, 114 dead, taking out a chunk of downtown. Waco never fully recovered from that storm.
For bigger cities, Atlanta has been hit by several smaller tornadoes, and Fort Worth took a direct hit on its downtown area a few years ago. It both cities, damage was costly, but injuries were few.
To predict ‘thousands of deaths’ shows an unfamiliarity with how tornadoes work.