As should be expected, the impacts of a still-in-planning Public Safety Power Shutoff (PSPS) by PG&E on November 20 are a moving target, and now we're learning that Alameda and Contra Costa County are in the mix.

As of late Sunday/early Monday, a press release from PG&E listed 19 potentially affected counties, and those did not include any in the East Bay. But as of Monday afternoon, PG&E's Potential PSPS Area Map clearly shows a large swath of Contra Costa County, as well as the hills all the way from Hercules down to San Leandro are potentially facing outages. That brings the number of counties impacted to 21.

"Vegetation is extremely dry," PG&E writes, and "a strong offshore wind event expected to begin early Wednesday morning (Nov. 20) and last through Thursday morning."

This is all a switch from the optimistic forecast last week, via a European model, of potential rain from a winter storm arriving from the north on November 20.

"We are less than a week-and-a-half away from Thanksgiving, we should be using umbrellas, but the rain season has not started and that sets the stage for a fire threat," says ABC 7 meteorologist Mike Nicco. Nicco says the wind gusts will peak after 7 p.m. Wednesday, and we will be feeling them in San Francisco and all over the Bay. Meanwhile we're looking at record warm temperatures today and possibly Tuesday.

If you're wondering whether your home will be affected in the Wednesday PSPS event, you can fill in your address here to find out.

Related: Ready The Candles: PG&E May Shut Off Power Mid-Week To Parts Of The Bay Area