I live in Washington state, but far upwind of Hanford.
Hanford has a long history of trouble.
Shelter in place instructions have been issued, and are very rare even at Hanford.
If it turns out that plutonium particles have escaped (possible, but not confirmed) then this could be the worst yet.
“... and are very rare even at Hanford.”
I used to do a lot of work at Hanford - including 200 East. In 9 years working there on and off (contractor) I had one “shelter in place”. It was a test drill. A drag when you are trying to get outside work done under budget.
I sure hope this isn’t as serious as it sounds. It could be a real disaster for the on-going work out there.