Bracing for a monstrous storm, residents and tourists clogged shelters or made last-minute preparations Friday as Hurricane Frances churned toward the Atlantic coast, where the state's second pummeling in three weeks could begin as soon as Saturday.

About 2.5 million residents were ordered to evacuate — the largest in state history.

The slow-moving storm's core was now expected to hit Florida Saturday afternoon or evening, instead of early Saturday as had been earlier predicted.

Stay with FOX News all this weekend for continuing live coverage of the storm's progress -- starting Friday night at 8 p.m. ET with host Shepard Smith.