was that the cascading failures that led to the great blackout were because of poorly maintained infrastructure in (IIRC) Ohio, which led to a massive failure (high tension long distance infrastructure wires literally melting) causing a massive failure of the ability to maintain the system's balance, leading to the progressive scramming of reactors across those areas.
Not weather related. Strictly shitty maintenance on the part of the utility that was supposed to be taking care of it.