In Monroe County, storm surge from Wilma impacted the Florida Keys twice, with the second event causing the worst coastal flooding in the island chain since Hurricane Betsy in 1965. At Dry Tortugas National Park, storm surge and winds damaged boats, destroyed docking facilities, and flooded the park office and livings quarters, but Fort Jefferson saw no major damage. Water submerged roughly 60% of Key West and left approximately 690 apartment units, homes, and mobile homes uninhabitable. Wilma damaged more than 4,100 single-family residences, 20 of which sustained major damage, and 6 experienced complete destruction. The hurricane also damaged roughly 2,500 mobile homes, with 257 suffering substantial impact and 15 being destroyed. About 90 apartment and condominium units received some degree of impact. As many as 20,000 cars suffered damage, prompting the "Key West Citizen" to refer to the lower Florida Keys as a "car graveyard." The storm ran hundreds of vessels aground, including 223 boats between Key West and Islamorada. Damage in Monroe County reached at least $200 million, with approximately half the total occurring in Key West, though the figure did not include incorporated areas.