Nearly two dozen boy scouts recovering. Alex perez takes us through what happened. Whoa! Reporter: When lightning strikes, disaster awaits. As a group of boy scouts in a remote part of new hampshire...
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Nearly two dozen boy scouts recovering. Alex perez takes us through what happened. Whoa! Reporter: When lightning strikes, disaster awaits. As a group of boy scouts in a remote part of new hampshire found out last night. They got caught in a storm, huddled underneath a tarp, when lightning stuck about 30 feet away from them. Minutes later, they started having muscle spasms and seizures. I blacked out. When I come to, I'm shuderring, I'm numb, I can't feel much. Reporter: All are expected to recover. And remember, they didn't suffer a direct strike. Only 3% of lightning-related injuries are caused by a direct strike. Most are caused as the energy spreads along the ground. Which means -- no place outside is safe. Reporter:25% of deaths happen on or near the water. If you're stranded outside. As small as you can. And as low as you can. Reporter: A last resort if you can't get indoors when thunder roars. Alex perez, abc news, chicago.
This transcript has been automatically generated and may not be 100% accurate.