June 24, 2026 | Campsite Selection • Rainy Camping • Mountain Camping
Lightning kills an average of 23 people per year in the United States (NOAA 2023 data), and camping/hiking accounts for roughly one-third of lightning fatalities—more than any other outdoor activity. The physics of lightning risk is counterintuitive: a tent under a tree is more dangerous than a tent in an open field because the tree attracts the strike and the tent receives the ground current radiating outward through the roots. Here is what NOAA's lightning safety research actually says about risk, what to do, and which camp locations are deadly.
When lightning strikes the ground, the electrical current (30,000 amps, 100 million volts) radiates outward in a hemisphere through the soil. The voltage drops with distance from the strike point—but soil resistance varies enormously. Wet soil conducts well (low resistance → current spreads wide, voltage drops gradually). Dry sand or solid rock conducts poorly (high resistance → current concentrates near the surface, voltage stays high for a greater radius). A person standing with feet apart creates a voltage differential between the feet—the current enters one foot, travels up the leg, across the pelvis (potentially through the heart), and exits the other foot. This is step potential. A person lying down creates an even greater potential difference between head and feet. This is touch potential. The "lightning crouch" (feet together, ball of feet only touching ground, elbows to knees, head down, insulating pad under feet) minimizes both by reducing ground contact area and keeping feet at equal potential.
| Camping Location | Lightning Risk Level | Why | Action |
|---|---|---|---|
| Ridge summit / exposed peak | Extreme | Highest point attracts direct strikes. No escape path. | Never camp here. If caught, descend immediately. |
| Under the tallest tree in a field | Extreme | Tree attracts strike. Ground current radiates through roots. Side-flash from tree trunk to person under it. | Never shelter under the tallest tree. Find uniform-height forest. |
| Open field / meadow (no trees nearby) | High | You become the tallest object. Direct strike risk. | Lightning crouch on insulating pad. Ditch trekking poles (conductive). |
| Shoreline of lake/river | High | Water conducts ground current efficiently. Flat exposure. | Move at least 100 ft from water's edge if lightning starts. |
| Uniform-height forest (all trees same height) | Moderate | Highest risk is ground current from nearby strike. Lightning preferentially hits taller trees; uniform forest = no single tallest tree = reduced direct strike risk. | Stay in a depression. Keep distance from tree trunks. Crouch on pad. |
| Valley bottom (depression) | Low | Surrounded by higher terrain. Lightning strikes above. Flash flood risk is the tradeoff. | Best location. Avoid dry washes (flash flood). |
| Inside a vehicle (hard-top, not convertible) | Very Low | Metal body acts as Faraday cage—current travels around outside, not through interior. Tires do nothing (the air gap is what protects). | Safest option. Don't touch metal surfaces. |
Count seconds between lightning flash and thunder. Sound travels roughly 1,100 ft per second (5 seconds = 1 mile). If the flash-to-bang interval is 30 seconds or less (lightning within 6 miles), seek shelter. Do not resume outdoor activity until 30 minutes after the last thunder. The 30-30 rule reduces lightning casualty risk by 90%+ according to NOAA analysis of lightning fatality data.
Carbon fiber and aluminum trekking poles are both electrical conductors. During a lightning storm, put them down flat on the ground at least 50 feet from your crouch position. Do not hold them. Do not lean them against a tree (they make the tree slightly taller, increasing strike probability marginally and creating a conduction path down the pole to you).
An inflatable sleeping pad or closed-cell foam pad between your feet and the ground reduces step potential by insulating the contact point. The Therm-a-Rest Z Lite Sol (R 2.0, $45, 14 oz) is closed-cell foam—non-conductive, cannot puncture, and provides 0.5 inches of foam between your body and the ground. During lightning exposure, fold it into a compact square and crouch on it with feet together. This is not lightning-proofing—it reduces current through the body by increasing resistance at the contact point. No sleeping pad provides complete protection from a direct strike. View Z Lite →
Tent poles are conductive. A tent pitched on an exposed ridge with aluminum poles attracts strikes. The correct protocol: if lightning is occurring (not just distant thunder—strikes visible within 3 miles), exit the tent. The tent poles are lightning rods. Crouch on a sleeping pad in a depression 50 feet from the tent. In heavy rain, the calculus shifts—hypothermia risk from cold rain may exceed the lightning risk, and staying in the tent becomes the lesser risk. This is a judgment call. The Black Diamond Firstlight Tent ($370) uses DAC Featherlite aluminum poles—strong and lightweight, but not something to be inside during an electrical storm on a ridge. View Firstlight →
Lightning causes cardiac arrest by disrupting the heart's electrical conduction system. Unlike a heart attack, the heart often restarts spontaneously within seconds—but respiratory arrest (paralysis of the breathing muscles from the electrical shock overwhelming the autonomic nervous system) persists. The victim stops breathing. The heart, beating on its own, has no oxygen to pump. Death occurs from hypoxia, not cardiac failure. This means CPR on a lightning victim—specifically rescue breathing—has an unusually high survival rate compared to cardiac arrest from other causes. Immediately begin CPR with rescue breaths (30 compressions, 2 breaths). Do not wait for EMS—the breathing must restart within 4-6 minutes to prevent brain damage. Lightning victims do not carry residual charge. You can touch them immediately. View CPR Mask →
Disclosure: BestCampGear is a participant in the Amazon Services LLC Associates Program. Lightning safety data from NOAA National Weather Service lightning safety guidelines and Wilderness & Environmental Medicine journal. Electrical engineering of ground current from IEEE lightning protection standards.