Between November 11 11:38 PM and November 12 12:48 AM PST we experienced API errors, network connectivity errors, and degraded EBS volume performance in a single Availability Zone in the EU-CENTRAL-1 Region. The network connectivity errors were resolved at 12:48 AM PST, the API errors were resolved at 1:26 AM PST. We have recovered the majority of the degraded volumes. A small number of volumes remain degraded. We continue to work to recover all affected volumes and will notify customers with impacted volumes via their Personal Health Dashboard. For immediate recovery, we recommend replacing any remaining affected volumes if possible. The issue has been resolved and the service is operating normally.

from Amazon Web Services Service Status