ATLANTIC CITY, N.J. — Gov. Chris Christie says anyone left on New Jersey's barrier islands should get off if they can before conditions get even worse.

Christie says "this is not a time to be a show-off, this is not a time to be stupid."

The governor says people should get off the islands when the tides recede Monday afternoon. If they are unable to, he says they should shelter on the highest levels of their homes.

Hurricane Sandy is expected to make landfall in southern New Jersey late Monday.

Several communities are already badly flooded from the storm surge.