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.

As monstrous floodwaters surged across central Texas late last week, officials at the Federal Emergency Management Agency leapt into action, preparing to deploy critical search and rescue teams and life-saving resources,

Two days after deadly Texas floods, the agency struggled to answer calls from survivors because of call center contracts that weren’t extended.

Forecasters warn that slow-moving storms could bring heavy downpours to already saturated areas, increasing the risk of flash flooding.

Democratic Representative Jared Moskowitz has called for Homeland Security Secretary Kristi Noem to be investigated over the Federal Emergency Management Agency's response to catastrophic flooding in Texas.

Homeland Security Secretary Kristi Noem has been exerting more direct control over the agency, which President Donald Trump has talked about "getting rid of."

It is hard to look at the heartbreak of the disaster in Texas. In Colorado past flash floods have brought similar heartache and similar threats.

President Donald Trump is touring the devastation left by flash flooding in central Texas amid growing questions about how local officials responded to the crisis as well as questions about the federal response -- including the fate of the Federal Emergency Management Agency -- that he has so far avoided.