The boys were camping in a gorge near Supai, Ariz. They had spent the past year preparing for their trip by going through endurance training and raising money.
Now, their leaders and families are trying to get them home.
Bridget Lai, whose son and husband are on the trip, says she's glad they're OK, but wants them to come home.
The flooding came after days of heavy rain breached an earthen dam, but no injuries have been reported.
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