ground the flights....
Seattle is one of the three (or four?) west coast enhanced screening airports. Closing the field means extra pressure on Calif. Washingtonians aren’t going to be mean to Californians are they? I hope they don’t forget we provide all those avocados for their morning toast...
I would be fine with grounding flights to any city near 2-3 cases. And shutting schools and public gatherings.
I would not be a very popular president, or governor.