Keyword Analysis & Research: flood map

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Frequently Asked Questions

How do I find a flood map?

FEMA is the official public source for flood maps for insurance purposes: NOAA is responsible for producing flood forecast maps that combine precipitation data with USGS streamflow data: USGS Flood Information: Maps and resources for current and historical floods.

How can a flood map be used?

Flood Map may be useful to some extent for flood risk assessment or in flood management, flood control etc. Flood Map may help to provide flood alert/flood warning if flood water level at certain point is rising. Flood Map can help to locate places at higher levels to escape from floods or in flood rescue/flood relief operation.

What do flood maps show?

Flood Map may help to provide flood alert/flood warning if flood water level at certain point is rising. Flood Map can help to locate places at higher levels to escape from floods or in flood rescue/flood relief operation. It can also provide floodplain map and floodline map for streams and rivers.

How often are flood maps updated?

FEMA is engaged in a multi-year process to update all FIRMs in the US. Flood zone maps show areas that have a 1% annual chance of a flood event (100-year flood zone) and areas that have a 0.2% annual chance of a flood event (500-year flood zone).


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