Rescuers searched for survivors at Camp Mystic on the bank of the Guadalupe River in Hunt, Texas, after deadly floods swept through the area on July 4.

It took just 90 minutes for the river to rise more than 30 feet. A look at the historic flood levels now etched into Central Texas history.

Follow along for developments on the July Fourth floods along the Guadalupe River in Kerr County and Central Texas.

Flash flood alley is a curved-shaped region about 300 miles long and 50 miles wide in central/south-central Texas, extending from north of Dallas to southwest of San Antonio. Its location, weather patterns, and geology often combine to create devastating floods.

Flash floods in Texas killed at least 82 people over the Fourth of July holiday weekend and left others still missing, including girls attending a summer camp. The devastation along the Guadalupe River,