ALT In Paris, Google Cloud seems to have partially operated two zones from the same data center. The fire that took the “europe-west9” region offline was caused by a water leak in the battery room at a Globalswitch data center, which is where one of Google Cloud's zones operates. Google published a preliminary incident report two weeks after the incident, on 10 May. In this report they wrote: A water leak caused a fire in a Paris data center, in the battery room. “The water leak initially impacted a portion of europe-west9-a; however, the subsequent fire required all of europe-west9-a and a portion of europe-west9-c to be temporarily powered down (...) Many regional services were affected while europe-west9-c was partially unavailable.” It’s clear the fire was in the data center where the europe-west9-a zone was based. But why would a fire in europe-west9-a require the powering down of a portion of an independent data center? The obvious explanation is that some instances of europe-we
