As the National Hurricane Center puts it, during a Category 4, “catastrophic damage will occur”:

Well-built framed homes can sustain severe damage with loss of most of the roof structure and/or some exterior walls. Most trees will be snapped or uprooted and power poles downed. Fallen trees and power poles will isolate residential areas. Power outages will last weeks to possibly months. Most of the area will be uninhabitable for weeks or months.

Hurricane Michael was already ripping roofs off of buildings as of Wednesday afternoon in Panama City Beach, Florida, according to footage from local station ABC 13 WSET News:

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