![]() ![]() NOAA Sea Level Rise: data from the National Oceanic and Atmospheric Administration Office for Coastal Management depicting potential sea level rise (SLR) and its associated impacts on the nation's coastal areas.It represents all of the public and many of the private roadways in Massachusetts. MassDOT Roads: official state-maintained street transportation dataset developed by the Massachusetts Department of Transportation.The data also provides critical information to citizens who live or work in areas that may need to be evacuated as a hurricane approaches. It provides critical information to aid local public officials in evaluating evacuation decisions as a hurricane approaches. Hurricane Evacuation Zones: data layer depicts areas that may be inundated by storm surge or isolated by storm surge waters. Once the map is open, enter your address in the search area or use the tools to navigate to a property of interest.Hurricane Inundation Zones: data representing worst-case Hurricane Surge Inundation areas for Category 1 through 4 hurricanes striking the coast of Massachusetts.FEMA Q3 Flood Zones: data layer showing areas for which the newer National Flood Hazard Layer are not available.This dataset represents the areas inundated in a 100-year and 500-year flood. FEMA’s National Flood Hazard Layer: a compilation of effective Flood Insurance Rate Map (FIRM) databases and any Letters of Map Revision (LOMR) that have been issued.Tidal flooding can also result in the salinization of land leading to loss of shaded areas and green space. Unshaded: Area of minimal flood hazard, usually at elevation greater than the 0.2 annual chance flood ('500 year flood') event. Rising sea levels may erode shorelines, threaten coastal drinking water supplies with salt-water intrusion, disrupt septic systems and sewage treatment, and displace residents. Area of moderate flood hazard, usually between the limits of the 1 annual chance flood (base flood or '100 -year flood') and the 0.2 annual chance flood ('500 -year flood') event. Furthermore, flooding can temporarily or permanently displace residents. Flooding can result in exposure to contaminated flood water, debris and physical hazards such as downed wires, loss of electricity and/or heat, unsafe food and drinking water, and mold growth. Projected increases in precipitation levels may exceed the capacity of existing infrastructure, such as drainage systems, bridges, culverts, and sewers, to divert water. Rising sea levels which can cause increased tidal flooding and higher storm surges.Increasing storm-related inland and coastal flooding.Increasing precipitation leading to flooding.Some of the most serious climate-related health hazards in Massachusetts are: ![]() You may also view the flooding map in a separate tab by clicking here. You will then need to refresh the page to see the flooding map. You can "Allow third-party cookies" or can disable "Prevent cross-site tracking" in the privacy tab of the settings page for your browser. To retrieve an estimated ground elevation based on the USGS National Map Elevation Point Query Service, click the tripod icon below to activate the tool, then click a point of interest on the map to get the estimated elevation.Ĭlick the survey icon and click up to 5 points for estimated ground elevation.The flooding map did not display because this browser blocks third-party cookies or prevents cross-site tracking. Note this information does NOT replace the need for a survey to determine existing ground elevations. For specific information on the USGS National Map Elevation Point Query Service, visit. ![]() For more information on the USGS 3DEP Program, visit. For the State of Hawaii, this data has not yet been updated similar to much of continental U.S., however it can be used as an order of magnitude when attempting to compare with the Base Flood Elevation (BFE). The ground elevation provided is an approximation using the USGS National Map Elevation Point Query Service, part of the USGS 3DEP program. Disclaimer: The use of this tool is for informational purposes only. ![]()
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