About 1 to 2.5 centimetres of rain fell in 30 minutes, creating a torrent in Bright Angel Canyon on Saturday.
Why it mattersRescue operations are ongoing as park officials work to locate the missing hikers.
AustraliaMany Australians visit the Grand Canyon; the disaster highlights sudden flood dangers in remote areas.
Corroborated bysmh.com.au·theguardian.com
✓ Claims checked against the source. checked 2 h ago
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