[polymuser]

“...of oil heat users who have an electric ignition on the oil burner that stops working during a blackout.”

And how do gas furnaces ignite and blow the warm air?

[Alberta's Child]

The same way. The point is that having a source of heat that doesn’t rely on natural gas doesn’t help if the furnace has to be started by electrical power that is generated by natural gas.

If your electricity is generated by natural gas, then a gas supply disruption will shut down gas AND oil furnaces.