More rain fell in flood-weary parts of Texas, where evacuations were under way and residents were bracing for even more of the constant downpours that have killed 11 people in recent days.
Officials reported calls for dozens of rescues in San Antonio, and hundreds of people were being ordered to leave their homes near the bloated Brazos River in North Texas.
Lt. Gov. David Dewhurst, acting as governor while Gov. Rick Perry is out of the country, surveyed damage Thursday in the lakeside community of Marble Falls, which was drenched by as much as 18 inches (46 centimeters) of rain early Wednesday. No one was killed, but there were 32 water rescues and widespread damage.
"I haven't seen so much destruction since I was on the ground right after Hurricane Rita," Dewhurst said, referring to a 2005 storm. "What these folks need is just a break in the rain and a chance to dry out."
In North Texas, rains continued falling west of Fort Worth, and evacuations of about 300 homes were ordered in Parker County as the Brazos River began creeping into some backyards.
Firefighters and National Guard troops went door to door notifying residents of the mandatory evacuation, but some refused to leave, said Lt. Jason Williams of the Parker County firefighters' search and rescue team.
Overnight rainfall in Central Texas was far short of the 10 inches (25 centimeters) that were forecast, but more was expected later Thursday, and flash flood warnings were in effect.
Marble Falls, about 40 miles (65 kilometers) northwest of Austin, took the brunt of the deluge Tuesday and Wednesday, with numerous people stuck on rooftops, in trees and on houses. The city was spared rain overnight, but a light drizzle fell on and off throughout the day Thursday.
As many as 150 homes and businesses were damaged, city spokeswoman Christine Laine said.
In San Antonio, 47 streets were closed and there were 39 calls for high-water rescues, although it was unclear how many people were rescued, said Sandy Gutierrez, a spokeswoman for the city Emergency Operations Center.
In the neighboring state of Oklahoma, where all 77 counties are under a state of emergency, 46 homes in Pottawatomie County have sustained major damage, officials said.