Quick Answer
High ground options for urban flash flood situations typically involve areas at least 10 feet above the projected flood level and accessible by land. Consider rooftops, upper floors of high-rise buildings, or elevated areas such as overpasses or bridges. Avoid areas prone to structural damage or collapse.
Identifying Safe High Ground
When searching for a safe high ground location during an urban flash flood, look for areas with a solid foundation, such as concrete or steel, and minimal risk of structural damage. Avoid areas near rivers, streams, or low-lying areas that can quickly become flooded. Use a GPS or map to locate nearby high ground options and assess the terrain.
Roof Safety Considerations
If seeking refuge on a rooftop, choose one with a sturdy structure and minimal slope. Avoid areas with loose or missing shingles, as these can provide little protection from the elements. Consider the weight capacity of the roof and avoid overloading it with too many people or objects. Aim for rooftops with a solid, flat surface and a secure entry point, such as a staircase or elevator.
Bridge and Overpass Safety
When using a bridge or overpass as a high ground option, select one with a sturdy structure and a solid rail system. Avoid areas with loose or damaged railings, as these can cause accidents or injuries. Be cautious of strong currents or rising water levels, which can sweep you off the bridge. Use a secure anchor point, such as a railing or a rope, when crossing the bridge to minimize the risk of being carried away.
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