by Grabeach » Wed 11 Sep, 2013 6:29 am
“We thought we’d be fine,” Hanson said, “the monsoon rains are usually in the late afternoon."
"Usually" means they can come earlier. I also wonder if they considered that there may be an accident and they could be delayed?
I've been through Zion. A lot of rock that is going to drain very quickly.
Obvious observation is that it is pretty dumb to do such canyons in the monsoon season, though I'll give them credit for keeping their heads and staying put in a safe spot.