How to stay safe hiking in a thunderstorm (2026)
Quick Answer
If you hear thunder while hiking, treat it as a lightning threat straight away: turn back or move quickly to a safer location, get off summits, ridgelines, open ground and away from isolated trees and water. If you cannot reach a substantial building or fully enclosed metal-topped vehicle, spread your group out, avoid metal gear contact, and minimise your exposure until at least 30 minutes after the last thunder.
Safety first
- If you hear thunder, you are close enough to be struck by lightning and should act immediately.
- The safest shelters are substantial buildings and fully enclosed metal-topped vehicles; tents and small open shelters are not safe lightning shelters.
- Get off summits, ridges, open slopes and away from isolated trees, water and metal cables or fences.
- Do not lie flat on the ground during a lightning threat.
- Spread a group out when no proper shelter is available so one strike is less likely to injure everyone.
- Wait at least 30 minutes after the last thunder before resuming travel.
- Watch for non-lightning hazards too: flash flooding, falling branches, slippery rock, hypothermia and poor visibility.
- If someone is struck by lightning or seriously injured, seek emergency help immediately and give first aid if trained.
When to call a professional: Stop and consult a qualified mountain guide, outdoor instructor or local land manager before the trip if your route involves exposed summits, scrambling, via ferrata, glacier travel or remote terrain where storm retreat is not straightforward. Seek urgent help from emergency services or a medical professional if anyone is struck by lightning, develops confusion, breathing trouble, chest symptoms, severe cold stress, or suffers a fall or other significant injury.
Overview
A thunderstorm is one of the most serious weather hazards hikers face because lightning can strike well away from the heaviest rain and can hit high ground, open areas, ridgelines, trees, water and metal objects nearby. The safest approach is not to be caught out at all: check the forecast, plan a conservative route, and turn around early if storm risk increases. If a storm develops while you are on the trail, your priorities are to reduce how exposed you are, get to proper shelter if one is realistically reachable, and avoid common mistakes such as sheltering under a lone tree or staying on a summit to “wait it out”. Good decisions matter more than gear. A waterproof layer helps with rain and cold, but it does not make you safe from lightning. Likewise, small shelters such as tents, picnic shelters and rock overhangs are not safe lightning shelters. If someone is struck, call emergency services as soon as it is safe to do so and give first aid if you are trained. This guide gives practical general steps for hikers, but local terrain, forecast quality and rescue access vary widely, so always follow official weather warnings and local land manager advice.
Who this is for
Day hikers, hillwalkers and backpackers who may encounter thunderstorms on foot, especially in exposed or mountainous areas.
What you’ll need
- A forecast check from an official weather service before setting out
- A route plan with escape options to lower ground or proper shelter
- Charged mobile phone or other emergency communication device where practical
- Map, compass and the skills to use them if visibility worsens
- Waterproof clothing and insulation to reduce cold stress in heavy rain and wind
- Head torch if delay or low visibility could push you into darkness
- Basic first aid kit
Before you start
Check the latest official forecast, thunderstorm warnings and local mountain or park conditions before you leave. If thunderstorms are forecast, avoid routes with summits, ridgelines, exposed plateaus, via ferrata, scrambling sections, river crossings or long sections far from safe exit points. Tell someone your route and expected return time.
Step-by-step
- 1
Check conditions and make a conservative plan
Before the hike, look at the official weather forecast and any thunderstorm warnings for your exact area and timing. Choose a shorter, lower or more sheltered route if storms are possible, and identify places where you can turn back early.
Why: Thunderstorm safety is mostly about avoiding exposure in the first place. Once you are high, remote or committed to difficult ground, your options shrink quickly.
- 2
Act on the first sign of thunder
If you hear thunder, see lightning, or notice storm clouds building rapidly, start moving to safety immediately. Do not wait for rain overhead. Turn around, descend from summits and ridgelines, and head towards safer terrain or a substantial building if one is genuinely reachable.
Why: Lightning can strike far from the centre of a storm, and early action gives you the best chance of getting off exposed ground before conditions worsen.
- 3
Move away from the most dangerous features
Leave high points, open ground, isolated trees, cliff edges, metal fences, via ferrata cables, water, wet gullies if flooding is a risk, and anything that makes you the tallest or most exposed object nearby. If carrying trekking poles or other metal items, put them aside and avoid unnecessary contact with them.
Why: These features increase lightning exposure or add other storm hazards such as flash flooding, slips and falls.
- 4
Use only proper shelter if available
Go to a substantial building with wiring and plumbing, or a fully enclosed metal-topped vehicle with the windows shut if one is available without taking unreasonable extra risk. Do not rely on tents, picnic shelters, bus shelters, caves with shallow overhangs, or standing under trees.
Why: Proper buildings and enclosed vehicles provide the best protection from lightning. Small or open shelters do not.
- 5
If no safe shelter is available, reduce exposure
Move to lower ground that is not prone to flooding, keep away from isolated tall objects, and spread your group out rather than clustering together. Stay off the ground as much as practical by keeping your feet close together and minimising contact with the earth; avoid lying flat. Wait there until the storm has clearly passed.
Why: This does not make the situation safe, but it can reduce the chance that one strike injures the whole group and may reduce harm from ground current.
- 6
Wait long enough before resuming
Remain in proper shelter, or in your reduced-exposure position if no shelter exists, until at least 30 minutes after the last thunder. Reassess the route, stream levels, footing and daylight before deciding whether to continue or abandon the hike.
Why: Lightning danger often persists after the main rain seems to ease, and trails may be more hazardous afterwards due to slippery ground, swollen water and poor visibility.
- 7
Respond to injuries and emergencies
If someone is struck or collapses, call emergency services as soon as it is safe. Start first aid if you are trained, following emergency dispatcher instructions where possible. Treat for trauma, breathing problems and cold exposure, and be ready for difficult evacuation conditions.
Why: Lightning injuries and storm-related falls are medical emergencies. Fast contact with rescuers and immediate basic care can be critical.
Why this works
The guide works by reducing the two main risks: being in a place where lightning is more likely to affect you, and remaining exposed for longer than necessary. It also addresses secondary storm hazards such as hypothermia, flooding, slips and delayed rescue.
Common mistakes to avoid
- Waiting for rain to start before reacting to thunder
- Staying on a summit or ridge to finish the route or take photos
- Sheltering under a lone tree or small open structure
- Assuming a tent or bothy bag is lightning protection
- Clustering the whole group together when no proper shelter is available
- Restarting too soon after the last thunder
Troubleshooting
The storm is approaching faster than expected and you are still on exposed ground
Abandon the objective immediately, descend by the simplest safe line, and prioritise getting off high or open terrain rather than staying on the planned route.
You cannot reach a building or vehicle in time
Move to lower ground away from isolated trees, water and metal features, separate the group, minimise ground contact and wait for the storm to pass.
Heavy rain makes the trail slippery and visibility poor
Slow down, use simpler terrain if possible, avoid stream crossings unless clearly safe, and consider stopping in the safest available place until visibility improves.
Someone in the group is getting very cold or confused
Treat it as a medical concern: add dry or warmer layers if available, use shelter from wind and rain, stop if needed, and seek emergency help if symptoms are severe or worsening.
Compare your options
Substantial building
Best for: Best available protection if nearby
Pros: Most effective lightning shelter; also helps with wind, rain and cold
Cons: Often unavailable on hiking routes
Fully enclosed metal-topped vehicle
Best for: Trailheads, roads or car parks
Pros: Good lightning protection when fully enclosed with windows shut
Cons: Only useful if you can reach it promptly and safely
Lower ground away from hazards
Best for: When no proper shelter exists
Pros: May reduce exposure compared with summits, ridges and isolated objects
Cons: Not truly safe; flooding and terrain hazards may still be present
Tent, tarp, overhang or lone tree
Best for: Not recommended for lightning safety
Pros: May keep off some rain
Cons: Poor or dangerous choice in a thunderstorm; can increase lightning risk or fail to protect from it
| Option | Best for | Pros | Cons |
|---|---|---|---|
| Substantial building | Best available protection if nearby | Most effective lightning shelter; also helps with wind, rain and cold | Often unavailable on hiking routes |
| Fully enclosed metal-topped vehicle | Trailheads, roads or car parks | Good lightning protection when fully enclosed with windows shut | Only useful if you can reach it promptly and safely |
| Lower ground away from hazards | When no proper shelter exists | May reduce exposure compared with summits, ridges and isolated objects | Not truly safe; flooding and terrain hazards may still be present |
| Tent, tarp, overhang or lone tree | Not recommended for lightning safety | May keep off some rain | Poor or dangerous choice in a thunderstorm; can increase lightning risk or fail to protect from it |
Alternatives
- Postpone the hike if thunderstorms are forecast
- Choose a lower, shorter route with quick escape options
- Start earlier and plan to be below exposed ground before the storm window
Pro tips
- Build turnaround points into your plan before you leave, so turning back feels like part of the route rather than a failure.
- Save the local emergency number and relevant weather app or forecast page before setting off where signal may be patchy.
- Watch for indirect signs of worsening conditions such as darkening skies, sudden wind shifts and rapidly growing cloud towers.
- Pack layers in a waterproof bag so you still have something dry if the storm soaks your rucksack.
Legal & regulatory notes
Follow any access restrictions, trail closures, ranger instructions and official weather warnings in your area. In managed parks or guided activities, operators may have specific safety rules or mandatory turn-back policies.
What this guide does not cover: This guide covers general hiking safety in thunderstorms only. It does not replace local weather warnings, mountain rescue advice, first-aid training, medical care, or specialist guidance for technical climbing, via ferrata, winter mountaineering, canyon travel, boating, caving or flood rescue.
Cost considerations
The main costs are weather-appropriate clothing, navigation tools, emergency communication options and, if conditions look doubtful, the possible cost of postponing or changing plans. Those costs are usually far lower than the consequences of an emergency or rescue.
Frequently asked questions
Is it safe to shelter under a tree?+
No. Isolated trees are a known lightning hazard. Move away from lone or prominent trees and seek a substantial building or fully enclosed vehicle if possible.
Does a tent protect me from lightning?+
No. A tent may help with rain and wind but it is not a safe lightning shelter.
Should I drop metal gear?+
Metal does not attract lightning in the simple way people often assume, but on a hike it is sensible to avoid unnecessary contact with trekking poles, packs with frames, cables and fences while you move away from exposed ground and metal features.
Can I keep hiking if the storm seems far away?+
If you can hear thunder, act as if the storm is close enough to be dangerous. Lightning can strike well away from heavy rain.
When is it safe to continue?+
A widely used rule is to wait at least 30 minutes after the last thunder before resuming. Then reassess ground conditions, water levels, temperature, visibility and your route options.
Sources & references
Guidance on this page is traced to documented sources. Last checked 25 September 2026.
- US National Weather Service - Lightning Safety · government
Supports the advice that if you hear thunder you are close enough to be struck, that substantial buildings and hard-topped enclosed vehicles are safer shelters, and that you should wait 30 minutes after the last thunder.
- Centres for Disease Control and Prevention - Lightning Safety · government
Supports the guidance to move indoors or into a hard-topped vehicle, avoid open areas, isolated trees and water, and follow general lightning injury safety advice.
Core lightning safety principles change slowly, but forecast tools, local access rules and emergency guidance can vary by area and over time.