northwestern caribbean, where some of the warmest water is. and that's why we anticipate further strengthening to a category 4 status. the official track from the national hurricane center does slow it down. late monday into tuesday, potential landfall as a damaging hurricane, and then taking a right turn towards the north. but a lot of uncertainty, the computer models we continue to watch have not come into agreement. the two most important ones, the american gfs and european model are not agreeing. american well within landfall. the euro keeps them offshore. so a long-duration event. the question is, landfall or off-shore? we're hoping for off-shore, but emergency managers are not taking any major action because of this until at least tomorrow. tom? >> rob we'll track it through the weekend. rob, thanks to you. and 17 million people bracing for the storm. it's not just homes and businesses that are being battened down. airports, construction sites, even the kennedy space center is on high alert tonight.