I know a woman that works (worked?) in Seattle awhile ago and had her car topper filled with emergency supplies in case the quake happened while she was at work. Some people scoffed at her, but as long as she had an attitude of being prepared and not being afraid I was for her.
I had to look up how much water a carrier can make. The web said 100,000 gallons a day are extra than what the normal operations require. Lets say they could ration the ship’s water and be able to supply 200,000. There are 356,000 people on Whidbey Island, so each person could get 0.6 gallons a day.
Although I bet there are a lot of water wells on the island that could supply water if they can get electricity to them to run the pumps.
I have camping water-filters in my various emergency kits so making drinking water in Western Washington won’t be a problem. Until somebody tries to steal it from me!
And speaking of somebody wanting my water filter, I’m guessing Seattle (and Portland and Vancouver, etc.) would be wanting their own aircraft carriers!
Not quite sure about that population figure since Oak Harbor was the largest city at about 23,000.
A lot of small private wells. No really big production wells like I have dealt with over here in the Yakima valley(1,000 to 2,000gpm). I was the City Engineer in Oak Harbor and our largest well was less than 200gpm.
I had a lot of dealings with the federal emergency planners. It always came down to the water supply and rationing what would be left over after serving the hospitals and other high risk places.
We had a private mobile home park just outside of the City limits that wells had went dry and they were lucky to be getting 30gpm.
The federal emergency planners new the loss of Deception Pass Bridge and our 24-inch watermain was not something to be taken lightly.