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.

Officials with Camp Mystic have confirmed 27 campers and counselors died in the flooding on the Guadalupe River this past weekend.

Also: San Antonio mourned the victims in a Travis Park vigil; UTSA said one of its teachers died in the Guadalupe River flood; Kerrville officials said a privately owned drone collided with a helicopter conducting search and rescue operations.

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.

Pamela Brown, CNN’s chief investigative correspondent, shared memories during a live broadcast in an off-the-cuff moment with an anchor.

The Guadalupe River flooded on Friday, July 4, impacting cities across Kerr County including Kerrville, Hunt, Ingram, and more, killing at least 27 people . At least 27 children remain missing from Camp Mystic, an all-girls summer camp in Hunt.

Rescue workers on Saturday continued their frantic search for survivors of the deadly and historic floods unleashed when the Guadalupe River burst from its banks in Kerr County on Friday. At least 24 people have died, and more than 20 girls from a private Christian summer camp were still missing.

Texas has identified more than $50 billion in flood control needs, but lawmakers have devoted just $1.4 billion to address them