A retired nurse, her son, and a family friend say they were lucky to survive last week's flash floods in Texas that killed more than 100 people, including many summer campers.

The grim task of searching for the scores of people missing from the devastating flood that struck Texas Hill Country nearly a week ago is taking an agonizing toll on searchers.

The Houston Texans were the first to announce their donations on Saturday, July 5, with more coming throughout the week. The Dallas Cowboys and the NFL Foundation joined the Texans on Sunday, July 6, with each contributing $500,000 in a $1.5 million total donation.

Over just two hours, the Guadalupe River at Comfort, Texas, rose from hip-height to three stories tall, sending water weighing as much as the Empire State building downstream roughly every minute it remained at its crest. The force of floodwater is often more powerful and surprising than people imagine.

More than 111 people have died across six counties after flash flooding from heavy rain began affecting the state last week.