As fall brings more crowds to the trails, local officials want hikers to stay prepared.

The Phoenix Fire Department responded to a call on Camelback Mountain on Monday.

The rescue was just one of many mountain rescue calls over the past week.

More hikers are hitting Valley trails as morning temperatures start off deceivingly cool, and then spike in the upper 90s during the afternoon.

“I think with the little bit of heat wave we’ve had recently with temps in the 90’s people are kind of surprised once they actually get out there that it’s actually hotter than they anticipated and they run short on water,” said Spencer Smith, President of the Central Arizona Mountain Rescue Association.

Jake Van Hook with the Phoenix Fire Department said hiking preparation starts with staying hydrated.

“People don’t often realize just much of a toll the dry air takes on you,” Van Hook said. “It dehydrates you quicker and you don’t sweat as much. The next thing you know, you realize, ‘wow, I’m dizzy.’”

The fire department says there is a higher volume of rescues this time of year as more visitors come to the Valley.