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.

At least 120 people are dead and 173 are missing in central Texas after the Guadalupe River swelled early Friday, causing destructive flash flooding throughout Kerr County.Now, new before-and-after satellite images of several sites throughout Kerry County show the devastation caused by the floods as crews embark on a seventh day of search and rescue efforts.

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.

On Water Street in the City of Kerrville, a memorial wall dedicated to the lives lost in last Friday’s devastating flood is growing.

The devastating floods that struck central Texas over the Fourth of July weekend have become one of the deadliest flood events in the U.S. in the past century, Newsweek previously reported. By Sunday evening, authorities had confirmed at least 82 fatalities.

Newly released satellite images reveal catastrophic damage caused by the Hill Country floods along the Guadalupe River.

President Donald Trump is visiting Texas on Friday to assess catastrophic flooding that has killed at least 120 people.