A flash flood warning has been issued for Dallas and Kaufman counties until 9:45 p.m.A strong thunderstorm will impact portions of south central Denton, northeastern Tarrant and northwestern Dallas counties through 8:30 p.

Flooding is the deadliest natural disaster facing Oklahomans, a threat far greater than tornadoes. In the United States, flooding kills an average of 103 people a year. Tornadoes, however, caused 48 deaths on average during the same period, according to the National Weather Service.