Satellite images show the damage left behind after floodwaters rushed through Camp Mystic, Camp La Junta and other summer camps on July 4.

Young girls, camp employees and vacationers are among the at least 120 people who died when Texas' Guadalupe River flooded.

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.

As questions swirl surrounding the timeline of who was notified about the flooding when, and if more could have been done, Department of Homeland Security Secretary Kristi Noem said an alert from the National Weather Service was sent to people in the flood zone -- but she said that doesn’t mean that people heard it.

Texas inspectors signed off on Camp Mystic's emergency plan just two days before the devastating flood killed more than two dozen people at the all-girls Christian summer camp​, most of them children.