4:58 PM PDT We can confirm that some instances are unreachable and some EBS volumes are experiencing degraded performance in a single Availability Zone in the US-EAST-1 Region. Engineers are engaged and we are working to resolve the issue.

5:05 PM PDT We have identified the root cause and are beginning to see recovery for instances and EBS volumes in the affected Availability Zone in the US-EAST-1 Region. We continue to work toward full resolution.