Severe Windstorm Checklist - FM Global

Severe Windstorm Checklist
CATEGORY 3 (continued)
• Low-lying escape routes inland cut by rising water three to five hours before windstorm center arrives
• Flat terrain up to 5 ft. (1.5 m) above sea level flooded inland 8 miles (13 km) or more; possible required evacuation
of low-lying residences within several blocks of shoreline
CATEGORY 4
• Storm surge 13 ft. to 18 ft. (4 m to 5.5 m) above normal
• Flat terrain up to 10 ft. (3 m) above sea level flooded inland as far as 6 miles (9.6 km)
• Shrubs and trees blown down; all signs down
• Extensive damage to inadequately installed roofing materials, windows and doors; complete failure of roofs on
many small residences
• Complete destruction of mobile homes
• Major damage to lower floors of structures near shore
• Low-lying escape routes inland cut by rising water several hours before windstorm center arrives
• Major erosion of beaches; possible required evacuation of all residences within 500 yards (457 m) of shore and
single-story residences on low ground within 2 miles (3.2 km) of shore
CATEGORY 5
• Storm surge greater than 18 ft. (5.5 m) above normal
• Shrubs and trees blown down
• Considerable damage to roofs of buildings; all signs down
• Very severe and extensive damage to windows and doors
• Complete failure of roofs of many residences and inadequately designed industrial buildings
• Extensive shattering of glass in windows and doors, some complete building failures
• Small buildings overturned or blown away, complete destruction of mobile homes
• Major damage to lower floors of all structures less than 15 ft. (4.6 m) above sea level within 500 yards (457 m) of shore
• Low-lying escape routes inland cut by rising water several hours before windstorm center arrives;
possible required evacuation of residential areas on low ground within 5 to 10 miles (8 to 16 km) of shore
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P9308 (Rev. 6/01) Printed in USA
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