The Daily Mail tabloid is carrying the story about the California blackout:
https://www.dailymail.co.uk/news/article ... ornia.htmlAPS, Arizona's largest electricity provider, said a utility worker doing maintenance near Yuma triggered the blackout.
The error, on a high-voltage power line linking Arizona and San Diego, causing a cascading series of electrical grid failures stretching into Southern California.
Authorities say the outage was accidentally triggered sometime Thursday afternoon when an APS electrical worker removed a piece of monitoring equipment at a power substation in southwest Arizona.
An APS statement said: 'The outage appears to be related to a procedure an APS employee was carrying out in the North Gila substation.
'Operating and protection protocols typically would have isolated the resulting outage to the Yuma area. The reason that did not occur in this case will be the focal point of the investigation into the event, which already is underway.'
...
A transmitter line between Arizona and California was severed, said Mike Niggli, chief operating officer of San Diego Gas & Electric Co., causing the outage. The extreme heat in some areas also may have caused some problems with the lines.
'Essentially we have two connections from the rest of the world: One of from the north and one is to the east. Both connections are severed,' Niggli said.
Power officials don't know what severed the line. Niggli said he suspects the system was 'overwhelmed by too many outages in too many places'.
Niggli said his 1.4 million customers may be without power until Friday.
The San Onofre nuclear power plant went offline at 3.30pm as they are programmed to do when there is a disturbance in the power grid, said Charles Coleman, a spokesman from Southern California Edison. He said there was no danger to the public or to workers there.
So, only one line was cut. But the other line went off automatically, they claim. So San Diego is only feed power from two lines? Actually, it appears, they only get power through one line, according to this 'experiment'.
They are saying the heat contributed to this. They must be implying the air conditioners running, using electricity.
Residents have been left sweltering in the late-summer heat.
In the moonlight: Even Mexico was affected by the outage, cutting power to buildings in Tijuana
'It feels like you're in an oven and you can't escape,' said Rosa Maria Gonzales, a spokeswoman with the Imperial Irrigation District in California's sizzling eastern desert.
It was about 115 degrees when the power went out for about 150,000 of its customers, she said.
I looked up San Diego on WeatherUnderground:
https://www.wunderground.com/cgi-bin/fin ... iego,%20caThe temperature is running about 74, with humidity of 60. But it says this is cooler than yesterday.
So I looked up the history for yesterday:
https://www.wunderground.com/cgi-bin/fin ... iego,%20caAnd it says it hit 86 max. That doesn't sound so hot.
Average humidity, 64. Not too bad.