13-32 雷暴范围内的户外没有安全的地方。最后一声雷响过 30 分钟，才算安全。美国国家气象局写明：要跑进结实…

来源：美国国家气象局. 户外雷电安全：「There is no safe place outside when thunderstorms are in the area」「Avoid open fields, the top of a hill or a ridge top. Stay away from tall, isolated trees or other tall objects」「Stay away from water, wet items, such as ropes, and metal objects, such as fences and poles」；实在走不了时「If you are in a group, spread out to avoid the current traveling between group members」；恢复活动「Wait 30 minutes until after the last rumble of thunder」；「Remember, a tent offers NO protection from lighting」「Do NOT seek shelter under the beach picnic shelters」「Cave entrances are dangerous during thunderstorms. Small overhangs can allow arcs to cross the gap」. https://www.weather.gov/safety/lightning-outdoors；美国国家气象局. 雷电安全：「If you hear thunder, you are likely within striking distance of the storm」「When Thunder Roars, Go Indoors」. https://www.weather.gov/safety/lightning-safety；美国国家气象局. 雷电误区：「Run to a substantial building or hard topped vehicle」「Being underneath a tree is the second leading cause of lightning casualties」. https://www.weather.gov/safety/lightning-myths