Always found it odd that many structures in those typical hurricane zones are built to lousy standards.  I just looked up the Florida Building Code, and it does vary according to area.  Miami-Dade has a stronger standard, largely because of hurricane Andrew exposing the lax codes.

http://www.solidworks.com/sw/products/product-data-management/37406_ENU_HTML.htm

Trouble is, the new codes wouldn't have withstood Andrew.  Miami Dade homes have to withstand 130mph winds.  Both Andrew, and possibly Irma, exceed that.  It baffles me that knowing your area can be hit with a category 5 hurricane, you'd set the codes lower and not higher.  People will say initial cost, but I'd bet one could meet cat 5 standards cheaper than replacing an entire home, and replacing lives lost won't happen no matter what the money amount is.