 Amy, we're talking about stronger winds and more water. A barrel hit parts of the Caribbean yesterday with catastrophic winds, life-threatening storm surge. Grenada's prime minister said the island of Carriacou was flattened. Buildings were damaged and destroyed. Communications were down. You know, when we talk about a Category 4 hurricane, we're talking about winds up to 156 miles per hour. That can cause severe damage to homes, tear off roofs, knock down trees. But the most dangerous threat is often water and flooding. For coastal communities, a big risk is from storm surge. It's essentially walls of water.