Anne Arundel County Executive John R. Leopold declared a State of Emergency in anticipation of Hurricane Irene and is advising residents in the flood plain to evacuate.

The majority of residents in a flood plain are in south county, including parts of Edgewater-Mayo, Shady Side and Churchton, plus some areas along the Patuxent River in Harwood and Lothian.

“We are expecting this storm to cause significant damage, including downed trees, damaged structures and flooding,” Leopold said in a written statement. “While protecting property is important and should be done throughout today, safety is the highest priority. If you live in the flood plain, it would be a good idea to evacuate to higher ground until conditions improve and it is safe to return to your home.”

Only the governor can issue mandatory evacuations. However, the county is urging residents of low-lying areas to seek higher ground starting Saturday morning.

A shelter at Annapolis High School will open at 4 p.m. Saturday at 2700 Riva Road, Annapolis. Domestic pets will be welcomed. Bring your pet’s food, medication, and vaccination records. Remember to bring all necessary supplies such as medications, sleeping bags and pillows, essentials for babies and the elderly, cash and important documents.

Prior to evacuating your home, secure all objects outside to minimize damage.

The National Hurricane Center forecasts that Hurricane Irene, presently located 420 miles Southwest of Cape Hatteras, NC, will move along the Delmarva coastline Saturday afternoon. The storm is now a Category 2 hurricane with winds of 110 miles per hour. It is expected to hold its intensity over the next 24 to 48 hours.

For Anne Arundel County, the worst part of the storm will hit overnight Saturday into Sunday.