The search and rescue efforts are intensifying for more than 160 people who remain missing days after flash floods killed more than 100 people in central Texas. New satellite imagery collected on July 8 shows the aftermath of the devastating flood along the Guadalupe River that swept through the area near Hunt and Kerrville, Texas.

Flash floods surged through in the middle of the night, but many local officials appeared unaware of the unfolding catastrophe, initially leaving people near the river on their own.

New human settlements constructed in recent years have made the waterway more hazardous, UT-Arlington civil engineering professor says.

FEMA and the U.S. Small Business Administration, in coordination with the Texas Division of Emergency Management, are opening a Disaster Recovery Center in Kerrville on Thursday, July 10, to help homeowners, renters and business owners impacted by the flooding.

KERRVILLE, Texas -- Several hundred people gathered for a worship ceremony at a high school stadium in Texas on Wednesday evening to remember the at least 120 people who died in the catastrophic flash floods over the July Fourth holiday, as well the many still missing.

Despite officials urging civilians to stay away, volunteers have joined the search for missing people and the cleanup on the Guadalupe River.

Before hundreds of first responders and volunteers from around the country came to help, it was the local residents of Texas Hill Country who faced down a deadly wall of water along the Gaudalope River and witnessed terrifying scenes.

During an interview with Fox News Monday afternoon, Lt. Gov. Dan Patrick said that he and Gov. Greg Abbott agreed that the state should erect sirens along the Guadalupe River.

As floodwaters from the Guadalupe River begin to recede, the emotional and physical toll on Hill Country residents is only just beginning to show.

Judy Dale has spent decades celebrating the Fourth of July in the Hill Country. This year’s trip turned terrifying when floodwaters forced a middle-of-the-night evacuation.