Although Phoenix restricts its most popular trails when extreme heat warnings are issued, danger can still arise when the trails are open this time of year.
Firefighters rescued a pair of hikers Monday who were without water on Camelback Mountain.
Fire Captain D.J. Lee says even normal summer temperatures are enough to put hikers in danger.
"It might not hit that heat index where they shut down the trails or close or restrict the trails. But it’s still extremely hot, the sun here is brutal," Lee said.
Lee says added humidity during monsoon season can increase the risks.
Although trails are expected to remain open this week, the forecast shows temperatures in Phoenix approaching 110 degrees Tuesday and Wednesday.
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