Do you have a generator?
Not that that would last much longer past there being no power.
I imagine the natural gas lines would go out, not long after the power company peeps stop showing up :(
We’ve got a gas powered one.
And gas for running it intermittently.
Could probably keep freezer stuff going for several weeks by running it off and on and covering them with blankets.
The BBC TV series “Survivors” 1975-1977 was about almost this exact situation. I dug out my DVD set and I’m watching it again, their virus was much quicker and far more deadly. It’s on YouTube in poor quality.