🚨 Big reminder that “redundant cloud” still has real-world edge cases. AWS reported a major data center issue in US-East-1 (Northern Virginia), specifically availability zone use1-az4. According to the AWS status update, a single data center’s power and cooling systems malfunctioned. As temperatures rose, some hardware triggered protection during power-off intervals—causing functional degradation for EC2 compute and EBS storage-related capabilities. And because EC2/EBS underpin many other AWS services, the impact didn’t stay neatly contained. AWS initially alerted customers around May 7, ~5:25pm PDT, then confirmed the overheating + power-related cause about 30 minutes later. By ~6:47pm PDT, AWS said it was working to bring temperatures back to normal, pausing much of the traffic from use1-az4 and advising users to shift to other AZs in US-East-1. Updates later indicated cooling recovery was slower than expected, with higher error rates and latency for affected services. If you run on US-East-1: review multi-AZ architecture and have failover/migration plans ready. #AWS #USEast1 #EC2 #EBS #CloudReliability #IncidentResponse
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