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.

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.

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.

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

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.

Several flood warnings and watches were issued across Central Texas on Sunday, including in the areas inundated by deadly flooding last week.

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

A stretch of chain-link fence along the Guadalupe River in the Texas town of Kerrville has become a focal point for the community's grief.

President Donald Trump suggested the tragic loss of life that occurred in Texas as a result of historic flooding could have been mitigated if the county had “bells... or something, go off.” In an interview with his daughter-in-law Lara Trump on her Fox News show,