At least 19 of the cabins at Camp Mystic were located in designated flood zones, including some in an area deemed “extremely hazardous” by the county.

The data also highlights critical risks in other areas along the Guadalupe River in Kerr County, revealing more than twice as many Americans live in flood prone areas than FEMA's maps show.

Texas authorities said Tuesday 87 people died in Kerr County as a result of catastrophic flooding along the Guadalupe River on the Fourth of July. Five girls and a counselor from Camp Mystic remain missing, the officials said.

Radar data can estimate rainfall to a fairly accurate amount. The rain data in the case of the deadly tragedy that unfolded in the Texas Hill Country last weekend shows exactly why the area around Camp Mystic and the Guadalupe River, outside of San Antonio, had such a raging flash flood.

Texas officials warn of more heavy rain after catastrophic flooding killed more than 80 people in the state. Follow for live updates.

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.

More than 100 people are dead and 150 known to be missing in Texas Wednesday from flooding but questions remain about how the effects of the deadly disaster could have been mitigated.