If this is not possible, crouch down. The worst place to be during a thunderstorm is standing under a tree on a hill. Some thunderstorms produce strong damaging winds. If you are outside, head for a strong building. Do not stand by windows.
Flash floods can occur anywhere when it rains with little or no warning.
Move to higher ground to escape flood water and never camp on low ground. Most deaths in flash flooding occur in automobiles. Do not attempt to cross bridges, dips, or low spots if water covers the roadway. If your vehicle stalls, abandon it immediately and seek higher ground. Be especially cautious at night when it is harder to recognize the danger of flooding.