# Nebius: Major incident: Region us-central1 partial degradation

**Summary:** _summary pending_
- Kind: Major incident · Label: major (vendor)
- Changed: 2026-08-19 10:43 UTC · Detected: 2026-10-19 17:03 UTC
- [Source: https://stspg.io/cch1mzfkh090](https://stspg.io/cch1mzfkh090)
- [Company: Nebius](https://rewindex.com/company/nebius.md)
- Versions: before (none: first archived) → after incident\_version:681/kk5ry8fr08g5@183a6f8d0acb
- Change 1 of 1 for this incident

Incident page (full timeline): [Region us-central1 partial degradation](https://rewindex.com/company/nebius/incidents/kk5ry8fr08g5.md)
## What changed

**1. Added: Title**

```diff
+ Region us-central1 partial degradation
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ postmortem
```

**4. Added: Start time**

```diff
+ 2026-08-19 10:43 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-08-20 08:16 UTC
```

**6. Added: Affected components**

```diff
+ Compute Cloud, Managed Service for Kubernetes®, Managed Service for MLflow, Managed Service for PostgreSQL®, Managed Service for SkyPilot, Object Storage, Serverless AI, Token Factory, US-CENTRAL1 - Compute Cloud, US-CENTRAL1 - Managed Service for Kubernetes®, US-CENTRAL1 - Managed Service for MLflow, US-CENTRAL1 - Managed Service for PostgreSQL®, US-CENTRAL1 - Managed Service for SkyPilot, US-CENTRAL1 - Object Storage, US-CENTRAL1 - Serverless AI, US-CENTRAL1 - Token Factory, US-CENTRAL1 - Virtual Private Cloud (Networking), Virtual Private Cloud (Networking)
```

**7. Added: Update** (investigating) · 2026-08-19 10:43 UTC

```diff
+ We are currently investigating this issue.
```

**8. Added: Update** (identified) · 2026-08-19 11:18 UTC

```diff
+ The root cause has been identified as overheating hardware. GPU performance is impacted, and some nodes may be unavailable.
```

**9. Added: Update** (identified) · 2026-08-19 12:20 UTC

```diff
+ We are still experiencing temperature issues in the us-central1. Team is working on it
```

**10. Added: Update** (identified) · 2026-08-19 12:52 UTC

```diff
+ The root cause was fixed, and the situation is stabilizing. The services are recovering.
```

**11. Added: Update** (identified) · 2026-08-19 13:49 UTC

```diff
+ Services are gradually continuing to recover.
```

**12. Added: Update** (identified) · 2026-08-19 15:06 UTC

```diff
+ Services are still gradually continuing to recover. Some virtual machines are already running, but not all of them.
```

**13. Added: Update** (identified) · 2026-08-19 16:00 UTC

```diff
+ Services are still gradually continuing to recover. Many of the virtual machines are already running, but not all of them.
```

**14. Added: Update** (identified) · 2026-08-19 17:26 UTC

```diff
+ Most nodes are operating normally. The Managed Service for Kubernetes® is experiencing a partial outage, and the team is actively working to restore it.
```

**15. Added: Update** (identified) · 2026-08-19 19:13 UTC

```diff
+ Most nodes are operating normally. The Managed Service for Kubernetes® is still degraded, but the situation is improving.
```

**16. Added: Update** (identified) · 2026-08-19 20:50 UTC

```diff
+ The Managed Service for Kubernetes is nearly fully restored, though a subset of nodes remains unavailable.
```

**17. Added: Update** (identified) · 2026-08-19 21:59 UTC

```diff
+ Most critical issues have been resolved and the region is operational, though a subset of nodes remains unavailable.
```

**18. Added: Update** (resolved) · 2026-08-20 08:16 UTC

```diff
+ This incident has been resolved.
```

**19. Added: Update** (postmortem) · 2026-09-01 09:15 UTC

```diff
+ [https://nebius.com/blog/posts/incident-post-mortem-analysis-us-central1-service-disruption-on-august-19](https://nebius.com/blog/posts/incident-post-mortem-analysis-us-central1-service-disruption-on-august-19)
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-08-19 10:43 UTC | Major incident: Region us-central1 partial degradation (this change) | major |

All Nebius changes: [timeline](https://rewindex.com/company/nebius/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/i7675cde516f61f · Markdown: https://rewindex.com/change/i7675cde516f61f.md · JSON: https://rewindex.com/api/v1/changes/i7675cde516f61f · Generated 2026-10-20T00:48:50.837Z