Resolved after 2 hours 58 minutes, affecting EU-Central and EU-Central, on June 18, 2026.
### **Dates:** Thursday June 18 2026, 03:45 UTC - 06:45 UTC. ### **What happened:** Approximately 7% of iOS devices in our EU data center were temporarily unavailable for customer test sessions after a loss of power to the rack hosting them. ### **Why it happened:** The power circuit feeding the affected rack exceeded its capacity, and a protective breaker tripped to safeguard the line - cutting power to the devices on that rack until the circuit was restored. ### **How we fixed it:** The affected circuit was reset and power restored to the rack, returning the devices to customer service. ### **What we are doing to prevent it from happening again:** We are redistributing power load across affected racks, adding capacity monitoring with early-warning alerts ahead of circuit limits, and introducing a capacity review before new devices are deployed to a rack.
Affected components
Update timeline
- investigating Jun 18, 2026, 05:30 AM UTC
Around 5:26 AM UTC we started experiencing lower iOS device availability in the EU-Central data center. Our team is actively investigating the root cause and working toward a resolution.
- monitoring Jun 18, 2026, 06:12 AM UTC
We have been experiencing device unavailability in our EU-Central-1 data center and have identified the root cause. We have taken remedial action and are currently monitoring.
- resolved Jun 18, 2026, 06:59 AM UTC
After taking remedial action, we are now seeing real devices available for testing in the EU-Central-1 data center. All services are fully operational.
- postmortem Jul 06, 2026, 05:17 PM UTC
### **Dates:** Thursday June 18 2026, 03:45 UTC - 06:45 UTC. ### **What happened:** Approximately 7% of iOS devices in our EU data center were temporarily unavailable for customer test sessions after a loss of power to the rack hosting them. ### **Why it happened:** The power circuit feeding the affected rack exceeded its capacity, and a protective breaker tripped to safeguard the line - cutting power to the devices on that rack until the circuit was restored. ### **How we fixed it:** The affected circuit was reset and power restored to the rack, returning the devices to customer service. ### **What we are doing to prevent it from happening again:** We are redistributing power load across affected racks, adding capacity monitoring with early-warning alerts ahead of circuit limits, and introducing a capacity review before new devices are deployed to a rack.
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