At least 28 people have been killed nationwide in the storms, 24 in Texas. At least 12 are missing in Texas.
More than 7 inches fell overnight from a line of thunderstorms that stalled over Dallas, which is in its wettest month ever recorded at 16.07 inches.
The National Weather Service reports rainfall records have been crushed across the Lone Star state from Corpus Christi along the Gulf of Mexico to Gainesville near the Oklahoma border. Even Amarillo in the dusty Texas Panhandle is in its second wettest month on record, said Meteorologist Dennis Cain from Fort Worth.
"In a lot of places we've exceeded the wettest year ever," Cain said. "You're talking maybe a 150 or 200 year event. It is quite astounding."
The greater Dallas area was one of the hardest hit on Friday. Firefighters in the suburb of Mesquite recovered the body of a man who drowned in his truck after it was swept into a culvert. Houston-area authorities found the bodies of two men who had been reported missing.
The unidentified man and two others, who later escaped, had been fishing in the Brazos River Thursday when they were caught in the currents.
First responders said the body of an unidentified person was pulled near the banks of the Blanco River late Thursday. A storm system last weekend that prompted the initial flooding also killed 14 people in the northern Mexico when a twister hit the border town of Ciudad Acuna.
