Yeah this was just not smart. At South Mountain where this happen, it's just a cooker. All the issues of a desert surrounded on four sides by millions of tons of asphalt and concrete to add to the convection oven temperatures.
The videos showed a bunch of the family in pretty bad shape as well. There was another guy that same day who was heli-vac'd off another trail in town.
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Don't just survive. Thrive.