Beware of approaching storm clouds. Wait on a safe spot inside a building; if a thunderstorm catches you in the open, find shelter in a building or vehicle. Do not carry metallic objects in the open. Do not linger under trees or power lines during a thunderstorm; lightning strike can be deadly! If possible, move vehicles into a garage in good time. Do not park under trees; a blast of wind can break branches or uproot a tree. Do not linger in the vicinity of torrential watercourses.