National Weather Service Florida East Coast Threat Maps

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These threat maps of wind (left) and storm surge (right) are based on the current forecast of the eye of the storm staying well off-shore (blue line paralleling the Florida coast). If the eye should track closer, or move inland, the threats would be even worse.

Please note that storm surge even now, is forecast to be 6 to 8' above ground level not including the effects of large waves. If it were me, and I lived 15' above sea level or lower between Palm Beach and Palm Coast, I would be leaving.

Addition: 3:54p, the colored dots in the eye of Dorian are lightning bolts. That is a strong indication the storm is maintaining its strength, unbelievably, strengthening further.