Heavy rain poured over parts of central Texas, dumping more than a month's worth of rain for places like San Angelo.

Businesses large and small also sprang into action to help the community. Grocery chain H-E-B, which started in Kerrville, one of the cities affected by the floods, has been donating food and supplies through the Red Cross. San Antonio-based fast-food chain Whataburger said it would provide meals to first responders.

Devyn Smith clung to a tree as muddy, debris-laden water rushed beneath her. She was ripped more than 15 miles from where she and five of her family members had set camp the night before.

The situation evolves daily. Several nonprofit groups that have arrived said they plan to remain on the ground for the next few weeks, providing physical, emotional, and spiritual support.

Officials have reported that 27 campers and counselors from Camp Mystic died in the devastating floods, with five campers and a counselor still missing.

In Kerr County, Thad Heartfield is leading nearly 100 volunteers searching for flood victims. For him, this mission is personal. His son and three of his son's friends disappeared in the flood.

The flash floods in Central Texas that have killed more than 100 people and left dozens missing happened quickly, raising the Guadalupe River 26 feet in just 45 minutes. CBS News environmental correspondent David Schechter joins to explain how climate change impacts severe weather events.