The lowest point of the ground level immediately next to a building.
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FEMA.gov 正在更新，以遵守特朗普总统的行政命令。感谢您的耐心和理解。
FEMA.gov 正在更新，以遵守特朗普总统的行政命令。感谢您的耐心和理解。
This page has not been translated into 简体中文. Visit the 简体中文 page for resources in that language.
The lowest point of the ground level immediately next to a building.