Lightning

Avoid exposed areas when lightning is present!

NPS Photo

Seasonal thunderstorms are frequent in the desert southwest and Zion National Park. Monsoon season, typically from July through September, brings increased atmospheric moisture and summer heat, which lead to strong thunderstorms.

Thunderstorms and flash flooding can happen even when they are not expected. Check the weather before you head into the park, and watch for signs of building storms.

If you hear thunder:

When thunder roars, go indoors! Don’t wait — seek shelter immediately.

• If you hear thunder, lightning is close enough to strike.
• There is no safe place outdoors during a lightning storm.
• Lightning can strike the same place more than once.
• Shelter in place at least 30 minutes after the last sound of thunder.

If you are outside:

Do not shelter under a tree or overhang. Do not lay flat on the ground. Find the best possible shelter and stay away from potential hazards.

• A couple good shelter ideas include:
  • A metal-topped vehicle with the windows up
  • A fully-enclosed restroom building
• Stay off high places like hills, peaks, or ridges.
• Stay away from bodies of water.
• Stay away from objects that conduct electricity (fences, windmills, power lines).
• If you are stuck outside, spread out. If one person gets injured, the others will be able to get help.

If someone is struck by lightning:

• Call 911 if you have cell service.
• Be prepared to begin CPR immediately.
• Use an Automated External Defibrillator (AED) if available.

For current weather information, check the National Weather Service forecast.