Hurricane sandy, already deadly. 21 killed in the caribbean so far. And sandy is now beginning its move up the east coast, set to be a historic storm. And everyone from the carolinas all the way up to... See More
Hurricane sandy, already deadly. 21 killed in the caribbean so far. And sandy is now beginning its move up the east coast, set to be a historic storm. And everyone from the carolinas all the way up to maine will feel its impact. It's expected to mix with two other huge systems, over one of the most densely-populated areas of the country. Experts are predicting at least a billion dollars in damage. Let's get right to sam, leading the coverage for our extreme weather team. Good morning, george. We want to give people a couple of days to get ready for this storm on the eastern seaboard. That's why we're talking about it so much right now. Look at the canopy of clouds here. About 2,000 miles across. That's unbelievable when you look at the size of the storm. But zoom in on where the storm is. That's what we're talking about. That's sandy. The hurricane center has it crawling up the seaboard. And this is new information. Makes a turn. Looks like by monday it goes out to the atlantic and hooks in, making a turn somewhere between washington, d.C. And new york city. Most likely in the delmarva peninsula, in the south jersey area. We get kind of a hybrid storm turning into the coastline. We're dogging about sandy, getting hit with an arctic blast of air at the same time. Extra infusion of energy. And getting spun up even more. Exactly where is the storm right now? It's off the coast about 300 miles from miami. You can see the feeder bands of rain getting in there. That's exactly where our ginger zee is this morning. Ginger, what are you feeling? That's right. We're between bands of rain. But the most impressive picture is behind me. The surf is pounding the beach. And watch this. The ocean has been coming up, this is not normal, all the way to the ropes, where the grasses and mangroves are. South florida gets more of a sideswipe from sandy. We get pictures of 10-foot to 15-foot waves at the shoreline. 30 feet out at sea. Rip currents would be most deadly. Do not go in the water if you're on the coast of florida. The next step, as this goes away from florida, is up the east coast, as you said, sam. That's where we find our linsey davis on the jersey shore. Reporter: Good morning, ginger. This coastal area is a big concern. Sandy is not only expected to hit here but to hit here hard. We look at the video from where irene hit this area last year. You can see that the sand mounds and the seawalls that are intended to be the front line for defense for the storm, they were no match for the heavy rains and winds. Water just poured right in. As a result, there was massive flooding, mandatory evacuations. And people in this area, bracing, preparing themselves for the worst.
This transcript has been automatically generated and may not be 100% accurate.