Texas floods: New flash flood warning comes after extreme weather leaves 19 dead and 13 missing

President Barack Obama pledges to aid Texas with federal assistance

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The National Weather Service has issued a flash flood warning on Wednesday morning for the Texas city of Houston.

Eleven people were confirmed dead in Texas, including four in Houston. The flood has also killed seven Oklahoma residents. And at least 13 people remain missing in Texas, NBC Connecticut reported.

Near Dallas, police evacuated residents living near a dam that was poised to burst on Wednesday due to surging floodwaters as emergency officials searched for bodies from storms that killed at least 17 in Texas and Oklahoma.

The record floods began on Memorial Day weekend destroying hundreds of homes. Officials near Dallas believed the Padera Lake dam would collapse.

Stephanie Parker, Ellis County emergency management coordinator, told CBS that she and several engineers who built the dam remained optimistic.

“All of us are watching it very closely,” she said. “The best case scenario is happening and we hope it continues to do so.”

On Tuesday, President Barack Obama assured Texas Governor Greg Abbott that Washington would aid the state during the emergency that devastated 40 counties in the state.

"I will anticipate that there will be some significant requests made to Washington," he said. "My pledge to him is that we will expedite those requests."