4:30 a.m. CDT

Harris County Flood control has advised residents waking up for work and school Tuesday morning to not leave their homes.

KHOU-TV reports The National Weather Service has issued an emergency flash flood Warning for southwest Harris County and northeast Fort Bend County.

Fans at the Toyota Center for the Houston Rockets' playoff game Monday night were advised not to leave because of weather conditions. About 200 people remained at the arena as of 3:50 a.m.

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2:30 a.m. CDT

Evacuations are underway in Austin, Texas, due to rising water that's threatening homes.

The Austin American-Statesman reported early Tuesday that some houses in a neighborhood in eastern Travis County had flooded after the Deck Creek left its banks.

EMS spokesman Mike Benevides told the newspaper crews had used boats and helicopters to rescue some residents and were conducting a door-to-door search.

It wasn't immediately clear how many rescues had been conducted. There were no immediate reports of injuries.

The evacuations come after a long holiday weekend that saw severe weather that led to at least four deaths across the state.

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2:15 a.m. CDT

A flash flood warning is in effect for parts of southeast Texas as a severe storm brings heavy rain to the Houston area.

The National Weather Service reported between 6-10 inches of rain had fallen there Monday night.

Authorities urged residents to stay off the roads.

The Harris County Regional Joint Information Center said that two bayous and other waterways were out of their banks and numerous roadways were impassable. The center said reports indicated some homes may have taken on water.

CenterPoint Energy reported nearly 81,000 area customers were without power.

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2 a.m. CDT

Recovery teams are set to resume looking for the 12 members of two families who authorities say are missing after a rain-swollen river in Central Texas carried their vacation home off its foundation, slamming it into a bridge downstream.

Trey Hatt, a spokesman for the Hays County Emergency Operations Center, said Monday night that the "search component" of the mission was over, meaning no more survivors were expected to be found in the flood debris along the Blanco River.

But recovery efforts were to resume Tuesday morning, following a long holiday weekend of severe weather that led to four confirmed fatalities across the state.

Authorities were also searching for victims and assessing damage just across the Texas-Mexico border in Ciudad Acuna, where a tornado Monday killed 13 people and left at least five unaccounted for.