Although if you do have charge in your battery, electric cars can act as a backup power supply for your home to help mitigate power outages like these. The CCS and CHAdeMO standards have roadmaps for vehicle-to-home protocols:
And do-it-yourselfers have been installing datacenter UPSs, when they can find one whose battery-bank voltage is similar to the car's traction-pack voltage:
https://www.youtube.com/watch?v=x78XGElU2I0
https://www.chademo.com/technology/v2x/
https://insideevs.com/news/342354/charin-ccs-combo-standard-...