My experience after being trapped at sea due to Hurricane Harvey
1. Park somewhere several feet above ground level. Many cars were flooded during Hurricane Harvey if they weren't on a raised parking level
2. Make sure you have a full tank of gas- (the entire Southern half of Texas ran out of gas after Hurricane Harvey)
Otherwise, you're probably safe at sea as long as it doesn't hit on embarkation day. If it hits on disembarkation day you might get a few free days at sea like we did.