The NWS Fort Worth TX issued a flash flood warning at 4:42 a.m. on Saturday in effect until 7:45 a.m. for Dallas and Tarrant counties.

Flash flood warnings have been issued for part of North Texas, as heavy rain and thunderstorms hit the area Saturday morning. The warnings are in effect for Collin, Dallas, Denton, Lamar, Tarrant and Rockwall counties until 8:30 a.

Waterlogged communities from Texas to Ohio woke up Sunday to rising rivers and more flooding, threatening large areas of the U.S. South and Midwest already badly damaged in recent days by severe storms that killed at least 16 people.

Another round of torrential rain and flash flooding was expected in parts of the South and Midwest already heavily waterlogged by days of relentless severe storms that in some cases spawned deadly tornadoes.