An EMERGENCY ALERT has been issued by the Isaac Local Disaster Management Group for coastal residents.

Council advises Tropical Cyclone Marcia is expected to cross near St Lawrence approximately 5am Friday as a Category 4.

Residents should self-evacuate or enact their Emergency Plan immediately.

For info contact Isaac Regional Council 1300 133 773.

In the event of an emergency call Triple-Zero (000) or for storm or flood assistance SES 132 500.