As power is restored to the Keys, electric icemakers — both commercial and home refrigerator units — will automatically start making ice again. However, unless the water flowing into the icemaker is filtered, it is not safe to consume ice cubes made with non-potable water.
Freezing non-potable water does not remove contaminants or kill microscopic organisms that can cause illness.
The entire Keys region continues to be under a boil water advisory, and water from the tap should only be used for sanitary purposes.
If you are making ice in a freezer, be sure to boil the water first.