On Sunday 2 June, 2019, Google Cloud projects running services in multiple US regions experienced elevated packet loss as a result of network congestion for a duration of between 3 hours 19 minutes, and 4 hours 25 minutes. The duration and degree of packet loss varied considerably from region to region and is explained in detail below. Other Google Cloud services which depend on Google’s US network were also impacted, as were several non-Cloud Google services which could not fully redirect users to unaffected regions. Customers may have experienced increased latency, intermittent errors, and connectivity loss to instances in us-central1, us-east1, us-east4, us-west2, northamerica-northeast1, and southamerica-east1. Google Cloud instances in us-west1, and all European regions and Asian regions, did not experience regional network congestion. Google Cloud Platform services were affected until mitigation completed for each region, including: Google Compute Engine, App Engine, Cloud Endpoints, Cloud Interconnect, Cloud VPN, Cloud Console, Stackdriver Metrics, Cloud Pub/Sub, Bigquery, regional Cloud Spanner instances, and Cloud Storage regional buckets. G Suite services in these regions were also affected.