East Coast closely watching storm's path.
Hurricane Earl, now a a powerful Category 4 storm, is moving closer to the eastern shore after bringing heavy rain and damaging winds to island areas along its Atlantic path.
Earl has already knocked out power to tens of thousands of islanders on its trek across the Atlantic.
In Puerto Rico there was heavy rain, strong winds and high surf.
Forecasters say the worst case scenario now is landfall somewhere along the East Coast.
"We think the odds favor it staying somewhat off shore, at least somewhat off shore, so that the worst of it doesn't hit the East Coast, but we cannot guarantee that will not happen at this point," says Weather Channel Hurricane Specialist Dr. Bryan Norcross.
Earl is already producing rough surf and strong winds off the coast of Florida.
Emergency planners say they're ready for the storm.
Right behind Earl is the newly formed Tropical Storm Fiona.
Forecasters say it's not expected to be nearly as powerful as Earl, but is still a system to be watched.