Rising Desert Heat Prompts Scottsdale Hiking Safety Warning

SCOTTSDALE, AZ — The desert heat is here, and Scottsdale wants hikers to take it seriously.

With temperatures climbing into the upper 90s and low 100s across the Valley this week, the city is urging residents and visitors to prepare before hitting the trails, pointing to a recent rescue near Tom's Thumb Trailhead as a reminder of how quickly conditions can turn dangerous.

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Earlier this month, Scottsdale Fire Department crews rescued a hiker and their dog near Tom's Thumb after the pair ran low on water and needed help off the trail. It wasn't an isolated case. In 2025, the Scottsdale Fire Department responded to 95 heat-related incidents across the city.

"Preparation saves lives. Whether you're a first-time visitor or a seasoned desert hiker, heat impacts everyone," said Jenna Kohl, director of the McDowell Sonoran Preserve. "We want people to enjoy these incredible protected lands, but we need them to do it safely."

Kohl's top recommendation: be off the trail by 10 a.m. After that, exposed desert terrain can become genuinely dangerous, even for experienced hikers.

Before you go, the city says to:

• Carry more water than you think you'll need, and consider turning back once half of it is gone
• Wear lightweight, sun-protective clothing
• Tell someone where you're hiking
• Bring electrolytes, a charged phone and a basic first aid kit
• Choose shorter routes when temperatures are high

Hiking with a dog? Pets face added risk because they can't regulate body temperature as efficiently as humans. Bring extra water, skip peak heat hours and watch for excessive panting, drooling or lethargy.

Know the warning signs. Heat exhaustion can look like dizziness, excessive sweating, clammy skin, nausea, muscle cramps or a rapid weak pulse.

Heat stroke is more severe—watch for a throbbing headache, red hot dry skin, no sweating, a rapid strong pulse or loss of consciousness. If someone shows signs of heat stroke, call 911 immediately.

The warnings apply across Scottsdale's trail network, including the McDowell Sonoran Preserve and Pinnacle Peak Park. More hiking safety information is available at ScottsdaleAZ.gov by searching "Hiking Safety."