Outdoors
Lightning safety outdoors: U.S. and Japanese guidance compared
When thunder roars, go indoors. What counts as safe shelter, staying safe inside, last-resort tips if you're caught outside, the myths that get people hurt, and how the National Weather Service's 30-minute rule compares with Japan's guidance on trees and 'protected zones', plus winter lightning on Japan's Sea of Japan coast.
Read more Lightning safety outdoors: U.S. and Japanese guidance compared
Never use stoves or heaters inside a tent: carbon monoxide at camp
Camp stoves, lanterns, charcoal and generators inside tents, campers or cars can kill. CDC's rules and numbers, Japanese test results (a campfire inside a two-room tent passed 200 ppm CO in about 9 minutes; a stove in a closed solo tent in about 15), symptoms, what to do, and how to stay warm without flame.
Read more Never use stoves or heaters inside a tent: carbon monoxide at camp