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.

Now, days later, four young campers and one beloved counselor are still missing. Search and rescue teams have not stopped. At least 150 people are known to be missing in Kerr County as a result of the flooding in Central Texas,