The already sprawling storm will grow larger as it hurls the ocean toward the East Coast and Bermuda, and it could have company this week.

Erin isn't as intense as it once was. But its large size is what matters most. While it won't landfall, it will bring high surf and rip currents to much of the East Coast. And it could bring damaging surge flooding for some.

Forecasts nudge Erin's likely path to the west, increasing the risks at U.S. beaches. Experts say the storm's massive size, rather than windspeed, is what makes it a threat.

Hurricane Erin strengthened back into a Category 4 behemoth over the weekend, the latest shift in what has been a remarkably fast-changing storm

Researchers at Virginia Tech say while rapid intensification of hurricanes, such as Hurricane Erin, is common, we are seeing higher rates than in the past. As Hurricane Erin moves through the Atlantic and is forecasted to create dangerous rip currents along the East Coast,