When storms roll in, water rushes downhill fast, gaining speed and force as it moves — often with deadly results.

When the precipitation intensified in the early morning hours Friday, many people failed to receive or respond to flood warnings at riverside campsites known to be in the floodplain.

At least 104 people are now confirmed dead across six counties in central Texas, surpassing the death toll from historic flooding brought on by Hurricane Helene. That death toll makes this tragedy the deadliest rainfall-driven flash flood in the U.S. since 1976.