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In addition, other bits of infrastructure were not up to the challenge. From Ronald Miller, National Weather Service Spokane, WA:
"The utility company in Spokane has instituted 'rolling blackouts' for the past two days, affecting about 24,000 customers for 3-4 hours during the hottest part of the day. The news article explained that the outages were not due to lack of supply (Washington dams generate a LOT of electricity, some of which is routinely shipped south), but rather the local city grid. The substations were overheating due to demand and had to be taken offline."
The news article in question: https://www.spokesman.com/stories/2021/jun/28/avista-asks-customers-to-conserve-energy-as-heat-s/
SUMMARY THOUGHTS
There is much more to be added to this page, but these things are of note:
#1 - There were numerous all time high temperature records set.
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