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 120 people are dead from the devastating flooding in the Texas Hill Country.

State officials vowed to continue searching for the many still missing but have acknowledged the dwindling chances of finding survivors alive a week after the disaster.

The threat of heavy rain is “slight” for this weekend, but with the ground fully saturated in Kerr County even small amounts of rainfall could cause flooding.

Hundreds prayed, wept and held one another at a Texas prayer service for the 120 people who died in catastrophic flash floods and the many more reported missing.

The Texas flood smashed through buildings, carried away cars and ripped sturdy trees out by the roots, dropping the debris in twisted piles when the water finally ebbed.