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In 1987, sudden and intense rainfall caused the river to surge at an unprecedented rate in mid-July, leading to a tragedy that killed 10 campers at Pot O' Gold Christian Camp, a summer camp near Comfort, Texas. The campers drowned when their bus attempted to evacuate them and was overtaken by floodwater.

Camp Mystic, the all-girls summer camp on the banks of the Guadalupe River in Texas, has confirmed that 27 children and counselors died in the flash floods that have tore through the area since Friday.