Green flags lined Fort Lauderdale Beach on Sunday, signaling calm conditions. But as Hurricane Erin approaches, officials say things could change in the coming days.

Hurricane Erin has weakened slightly overnight but remains a very strong storm with winds well over 120 mph, making it still a major hurricane. The track remains mostly unchanged. It will start making that northern turn in the next 24 hours.

As the hurricane makes its way north well off the coast of the United States, the Space Coast will get rain and beach impact, meteorologists say.

The Atlantic basin includes the northern Atlantic Ocean, Caribbean Sea and Gulf of America, as the Gulf of Mexico is now known in the U.S. per an order from President Trump. NOAA and the National Hurricane Center are now using Gulf of America on its maps and in its advisories.

5 p.m. Update: Erin is now organizing and strengthening over the Central Atlantic. Erin is expected to become at least a Catgory 3 hurricane but missing Puerto Rico to the north and staying well east of Florida. It is expected to reach Jacksonville’s latitude about early Wednesday, resulting in some rough seas and surf at area beaches next week.

Here's a quick, easy-to-read look on the latest about Tropical Storm Erin, including what Florida residents should be doing.

Even when they don't brush the coast or make landfall, such storms can be deadly and cause millions of dollars of damage. Erin is expected to remain hundreds of miles offshore, according to the National Hurricane Center,