A major AWS outage struck the critical US-East-1 region on October 20, 2025, lasting roughly 14 hours and triggering widespread disruptions across services including DynamoDB, EC2, S3, and Route 53. The root cause was a DNS resolution failure that prevented applications from locating stored data despite intact storage, affecting platforms such as Snapchat, Roblox, Fortnite, Signal, and various banking and retail apps. AWS classified the event as “disrupted” on its Health Dashboard, the official resolution source for related Polymarket contracts. Partial outages continue in Middle East regions (Bahrain and UAE) amid separate incidents, while smaller issues have appeared in Spain and elsewhere. Traders monitor the AWS Health Dashboard for severity classifications, with upcoming catalysts including any new regional incidents or large-scale service launches that could strain infrastructure.