Emergency crews have suspended their search for victims of catastrophic flooding in central Texas amid new warnings that additional rain will again cause waterways to surge.

The risk of the catastrophic flooding that struck Texas Hill Country as people slept on July 4 and left at least 120 dead was potentially underestimated by federal authorities, according to an ABC News analysis of Federal Emergency Management Agency data, satellite imagery and risk modeling.

At least 161 are still unaccounted for after the July Fourth floods that saw the waters of the Guadalupe rise to historic levels in Central Texas, officials with Kerr County said Friday. Authorities have confirmed 103 deaths, 36 of whom are children.

This part of Texas Hill Country is known for flash floods. Why were so many people caught off guard when the river turned violent?

Kerrville residents who turned out in force Friday to welcome President Donald Trump said his visit brought hope and comfort — and marked an important step in the town’s long road to healing and rebuilding.

A chain-link fence that separates Water Street in the center of Kerrville from the Guadalupe River just a few hundred feet away has become a makeshift memorial, with the flower-covered stretch serving as a focal point for a grieving community.

Here's what to know about the deadly flooding, the colossal weather system that drove it and ongoing efforts to identify victims.

More than 2,100 searchers from a dozen Texas Counties, other states and Mexico are continuing recovery efforts to find more victims of the deadly flash flooding in central Texas.

If you would like to volunteer to help with flood recovery, the city said to register in advance online. Registered volunteers are asked to come to Tivy Antler Stadium, located at 1310 Sydney Baker Street in Kerrville. Check-in starts at 8 a.m.

As tears streamed down their faces, community members looked at the photos attached to a growing memorial wall.