At least 28 people have been killed nationwide in the storms, 24 of them in Texas and at least 11 are still missing in that southern state.
More than 17.8 centimeters of rain fell overnight from thunderstorms that stalled over Dallas, which is in its wettest month ever recorded, at 40.8 centimeters.
The National Weather Service reports rainfall records have been smashed across Texas 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.
"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."
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A handful of volunteers, meanwhile, trudged along the muddy banks of the Blanco River in central Texas, searching for the missing. A soggy teddy bear caught in a tree provided a stark reminder that children were among them. The volunteers, led by Toby Baker, marked where the bear was found and talked about the pajamas the children were wearing the night the river crested.
"I've got a young family," he said. "I'd like to think someone would come out and do the same for us."
The greater Dallas area was one of the hardest hit on yesterday. 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 other men.
The body of 87-year-old Jack Alter, who was swept away when a boat attempting to rescue him from a bayou overturned, was found in the Houston Ship Channel. The search for a missing 51-year-old man was called off yesterday after a body on a southeast Texas beach matched his description.