Coal-fired electric plants can get fuel delivered where ever there's rail road tracks.
Gas-fired plants need pipelines.
Unfortunately, the Utopian central planners to push us onto new gas plants failed to build the pipelines needed to keep the gas plants running.
It's been a problem in places like Cleveland.
The rush to kill coal plants means new plants can only be built in particular places, and there's less redundancy when gas lines are maxed and gas supplies run short.
At best, this is short-sighted as our fragile electrical infrastructure is made more fragile, less robust.