Out of all of South Carolina's regions, only one is vulnerable to the type of catastrophic flash river flooding that hit Texas July 4: The Upstate.

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.

Unfounded rumors linking an extreme weather event to human attempts at weather modification are again spreading on social media. It is not plausible that available weather modification techniques caused or influenced the July 4 flash flooding along the Guadalupe River in Texas.

Searches were suspended and a new flash flood warning was issued in Kerrville and Kerr County, Texas, on July 13 in the wake of the flooding that struck the area last week on July 4. The warning was downgraded to a flood watch hours later.

When the precipitation intensified in the early morning hours Friday, many people failed to receive or respond to flood warnings at riverside campsites known to be in the floodplain.

A crew from the North Dakota Air National Guard will use a drone to assist with the search for victims in the aftermath of flash floods in Texas.

The torrents that washed away so many Texas lives have brought a flood of volunteers in their wake. And for those picking up the pieces, those volunteers have brought hope to a devastated landscape.