On Tue, 18 Jun 2019 08:52:20 +0100
"Brian Gaff" wrote:

This sort of catastrophic failure happened in the US some years ago
when a lot of the Eastern Seaboard was load shed as sub station after
substation got overloaded due to not very smart software in control.
I'm sure this problem can happen anywhere there is a grid.
Brian


We lived near Detroit at the time, and it happened one afternoon.
Suddenly everything went silent, for four days. And being in
summer, it was hot and humid. But we got through it. They said it was
caused by a squirrel.

--
Davey.