Sempra (formerly Enron) owns SDG&E and they wanted to build a coal fired power plant but the state wouldn't let them so they built it in Yuma right across the state line and bring the power in. Also, the whole southwest and northwest Mexico is on one grid so if you lose part of the grid you can get a cascade of failures which takes the whole region out. Remember how the whole east coasts of the US and Canada got knocked out a few years back? The other big problem is both of the nuclear plants here shut down as a precaution thus resulting in big power cuts.
Here's some pictures of the blackout I found on the net.


Here's some pictures of the blackout I found on the net.



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