Google Cloud outage, 20 August 2026

Google Cloud us-west1 fiber maintenance congestion (20 August 2026). The disruption lasted about 2 hours 22 minutes, according to Google Cloud’s own timeline.

What happened. Scheduled fiber-optic maintenance unexpectedly cut network capacity between data centers in us-west1. The resulting congestion caused timeouts, errors and elevated latency across many products until capacity was restored.

What changes. Google will reform scheduled maintenance protocols, add stricter safety checks and circuit redundancy requirements before maintenance, and refine automated regional traffic failover.

Questions

What caused the Google Cloud outage in August 2026?

Scheduled fiber-optic maintenance unexpectedly cut network capacity between data centers in us-west1.

Which services were affected?

Multiple Google Cloud products in us-west1 (e.g., Compute Engine, GKE, BigQuery, Cloud Storage, App Engine).

Read how shared dependencies spread a failure in why one cloud outage can break unrelated apps, or browse the outage archive.