 National Hurricane Center Director Michael Brennan says people in the Windward Islands should comply with any evacuation orders they may receive. We're most concerned about areas from St. Vincent and the Grenadines south to Grenada where we could see the core of that Category 4 hurricane move through. When you get to Category 4 strength, you can see things like total roof damage, roofs lifted off of homes, exterior wall collapse, trees uprooted, significant damage and complete destruction of power lines and other infrastructure.