supply system. e D—100-299 acres Impacts to air quality.
@e E—300 to 999 acres
e F—1,000 to 4,999 acres Impact to roadways.
e G—5,000 to 9,999 acres
e H—10,000 to 49,999 Loss of natural resources.
acres
e I—50,000 to 99,999 Potential for urban
acres conflagration.
e J—100,000 to 499,999
acres
e K—500,000 to 999,999
acres
@ {—1,000,000+ acres
st step in determining the probability of future hazard events in the City on Nashua is to examine the location, extent, and impact of
us hazards. If a hazard event has not occurred within the City of Nashua but has occurred in the region it is also noted. These regior
are included as it would be reasonable to expect the event could have occured in Nashua. All SHELDUS data and recorded losses inc
lillsborough County.
azard event also includes a source for the data. The primary sources of data include the Nashua Hazard Mitigation Plan Update 201:
ampshire Hazard Mitigation Plan 2018 Update, neighboring Hazard Mitigation Plan Updates (Hollis & Hudson 2018 Updates) (unkno
| sources), Arizona State University Spatial Hazard Events and Losses Database for the United States (SHELDUS) 16.1 January 1960 t
iber 2016), & FEMA Presidential Disaster Declarations (1953-2018).
ble does not take hazard extent into account as a threshold for inclusion. As a result, many hazard events of a lower hazard extent n
documented. This will typically be found in more frequently occurring hazards such as inland flooding, lightning, and severe winter
or. Efforts should be made to improve municipal recordkeeping for smaller hazard events. A common example can be inland floodin:
that temporarily close roadways as a result of thunderstorms.
