The Phoenix area is known for its clear skies most of the year, but during monsoon season, fast-moving thunderstorms can form with little warning. Lightning is one of the biggest dangers hikers face in these storms, and Arizona ranks among the top states for lightning strikes.
If you find yourself on the trail when thunder rolls in, here’s what to do.
1. Know the Signs and Get Off the Trail Early
If you hear thunder, you’re already within striking distance of lightning. Storms can move fast across the desert, so turn back immediately at the first sound of thunder or sight of dark, anvil-shaped clouds.
Check the forecast before heading out, especially during July through September, when monsoon storms are most common in Phoenix.
2. Avoid Exposed High Points
Lightning tends to strike the highest object in an area. If you’re on a summit, ridge, or high saddle (like on Camelback, Piestewa, or South Mountain), descend quickly to lower ground.
Avoid open flat areas, peaks, and ridgelines. Don’t shelter under lone trees, towers, or metal structures.
3. Stay Away from Water and Metal
Water conducts electricity, so stay clear of creeks, puddles, and wet washes.
Drop hiking poles or metal gear and keep them a short distance away from you. Remove backpacks with metal frames if lightning is nearby.
4. Spread Out if You’re in a Group
If hiking with others, spread out at least 50 feet apart. This reduces the chance that one strike affects everyone. Keep visual contact but don’t cluster together.
5. Use the Lightning Safety Position (as a Last Resort)
If you’re caught in a storm with no shelter:
Crouch low on the balls of your feet
Keep your heels together
Make yourself as small as possible
Cover your ears to protect from thunder
Do not lie flat on the ground
This position minimizes your contact with the earth and reduces the chance of current traveling through your body if lightning strikes nearby.
6. Wait It Out
Stay in your low, safer area until 30 minutes after the last thunderclap. Storms often pass quickly, but lightning can strike even when it seems to have cleared up.
7. Plan Ahead for Monsoon Season
Start early in the morning before storms develop.
Check radar and forecasts from the National Weather Service Phoenix Office before you go.
Always let someone know your hiking route and return time.
Consider carrying a weather alert app or satellite communicator.
The best way to survive a lightning storm is to avoid it altogether — but if you’re caught outdoors, knowing what to do can save your life.
Arizona’s desert trails are beautiful and wild, but they demand respect for the power of nature. When thunder roars, go indoors, or as low as you can get.
