Roughly 20,280 Escambia County customers remain without power as of Monday morning.
Multiple new systems are now forming in the Gulf and Atlantic.
More than 600 rescue missions were performed by Wednesday evening.
Gov. Ron DeSantis warned flooding is the "initial salvo" of the storm.
The Florida National Guard has activated roughly 500 soldiers and airmen.
More than 592,000 Florida, Alabama and Louisiana customers are without power
13 Florida counties are under a state of emergency order.
Gov. DeSantis added 11 counties to an emergency order.
Sally is forecasted to make landfall over southeastern Louisiana late Tuesday or early Wednesday.
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