The hosting company of this site has data center in Los Angeles. So they are affected by the power outage happened several days ago.
The company sent out long email explaining how it happened. Basically the building has triple redundancy but wasn’t well tested. When real power problem happened, those redundancy power systems only lasted minutes instead of days as they are designed.
Stress testing sounds easy but in reality very very few people bother to do it. The company next door had a power generator, put into place and tested, everything worked fine. However, when the main power was down, the generator turned out to have only 2 gallons of fuel – lasted about 5 minutes.