"europe-west-9 (Paris) has been physically flooded [...], but has zero impact elsewhere."
I am afraid this is not true. We have nothing in europe-west-9, but problem in this region caused global problem with Cloud Console, which hit us, because we were not able to use it for several hours.
"Cloud Console: Experienced a global outage, which has been mitigated. Management tasks should be operational again for operations outside the affected region (europe-west9). Primary impact was observed from 2023-04-25 23:15:30 PDT to 2023-04-26 03:38:40 PDT."