The uncertainty about what happened at Mystic comes as local officials have repeatedly dodged questions about who was monitoring the weather and what measures were taken ahead of the flooding.

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.