Is Azure Cosmos DB down?
Current Azure Cosmos DB status is UP

Impact Statement: Starting at approximately 08:30 UTC on 30 August 2023, a utility power surge in the Australia East region tripped a subset of the cooling units offline in one datacenter, within one of the Availability Zones. While working to restore cooling, temperatures in the datacenter increased so we proactively powered down a small subset of selected compute and storage scale units, to avoid damage to hardware. Multiple downstream services were impacted, with targeted communications being distributed via Azure Service Health.
Current Status: Having successfully recovered 99% of storage services and 99% of impacted Virtual Machines, we are beginning to see the recovery on the impacted nodes. At this stage, we believe most downstream services that are still experiencing impact are the result of dependencies on one of three services with recovery ongoing.
Power has been restored to all clusters hosting Cosmos DB. Accounts that were not failed over should see recovery in Australia East. Accounts failed over to alternate regions will continue to operate in these alternate regions; the Cosmos DB team has begun to bring Australia East region online.
Over 99% of impacted Azure storage accounts are now fully recovered. Due to thermal damage, we continue working on recovering a small number of resources to bring the remaining impacted storage accounts back online. We have recovered 75% of the remaining impacted resources, and as we continue making progress, additional services are displaying indications of improvement.
Azure SQL is continuing to recover impact to a single backend cluster, impacting a small subset of databases instances. Additionally, we are taking steps to reduce the overall zonal load to facilitate improved resource allocation and recovery.
Further updates on these remaining recovery efforts will be provided 2 hours, or as events warrant.
This message was last updated at 14:47 UTC on 31 August 2023

Impact Statement: Starting at approximately 08:30 UTC on 30 August 2023, a utility power surge in the Australia East region tripped a subset of the cooling units offline in one datacenter, within one of the Availability Zones. While working to restore cooling, temperatures in the datacenter increased so we proactively powered down a small subset of selected compute and storage scale units, to avoid damage to hardware.
Multiple downstream services were impacted, with targeted communications being distributed via Azure Service Health. Impact to services is limited to Australia East, except for Azure Kubernetes Service (AKS) which has impact in both Australia East and Australia Southeast due to a dependency in the former. If your workloads are protected by Azure Site Recovery or Azure Backup, and you need critical services back online before all services in this datacenter are fully recovered, we recommend either to initiate a failover to the recovery region or recover using Cross Region Restore. Note that any new allocation requests for the Australia East region will automatically avoid the impacted scale units. 
Current Status: Mitigation efforts are continuing, we have made significant progress in restoring core services, and we expect that the vast majority of remaining services should be back online in the next 2-3 hours. After restoring power and stabilizing temperatures, all network infrastructure and 95% of storage services are back online. All premium disk storage has fully recovered, we continue to work towards mitigating the final remaining storage devices. The majority of underlying compute services are back online, with more than 85% of Virtual Machines that were impacted now back online and healthy. As a result, many customers of these services have already recovered - but we continue to work with downstream impacted services to ensure that they are coming back online in the next 2-3 hours as expected. Further updates will be provided in 60 minutes, or as events warrant.
This message was last updated at 19:05 UTC on 30 August 2023

Engineering identified networking issue in west europe impacting subset of users in connectivity to resources hosted in this region
Engineering are investigating and next update in 60 mins or as soon as possible
This message was last updated at 04:55 UTC on 16 June 2023

Impact Statement:
Starting around 20:19 UTC on 7 February 2023, a utility power surge in the Southeast Asia region tripped a subset of cooling units offline in one of the Availability Zones. While working to restore the cooling units, temperatures in the datacenter increased and we have proactively powered down a number of compute and storage units to avoid damage to hardware and reduce cooling system load. All impacted storage and compute scale units are in the same datacenter, within one of the region’s three Availability Zones (AZs).Multiple downstream services have been identified as impacted. 
Current Status – 12:05 UTC
We have made progress in restoring some of the affected cooling units and are continuing to work to restore the remaining units in parallel. The restoration of cooling units is helping with reducing temperatures towards normal operation thresholds in the impacted areas of the datacenter. Once operational threshold temperatures have stabilized, we will begin work on the structured restoration of Compute and Storage resources which were proactively shut down.
We will continue to provide updates as we have further progress towards service restoration. For workloads protected by Azure Site Recovery or Azure Backup, we recommend initiating a failover to the recovery region or to use Cross Region Restore. Newly deployed resources will by design bypass the impacted scale units.
We will provide our next update in 60 minutes or as events warrant.
This message was last updated at 12:46 UTC on 08 February 2023

Impact Statement: Starting around 20:19 UTC on 7 February 2023, a utility power surge in the Southeast Asia region tripped a subset of the cooling units offline in one of the Availability zones. While working to restore the cooling units, temperatures in the datacenter increased so we have proactively powered down a small subset of selected compute and storage scale units, to avoid damage to hardware and reduce cooling system load. All impacted storage and compute scale units are in the same datacenter, within one of the region’s three Availability Zones (AZs). Multiple downstream services have been identified as impacted.
Current Status: We do not have an exact ETA at this time, we currently expect an extended period of time to fully restore all cooling capacity. The Azure service recovery process will commence at this time and is expected to progressively return over a number of hours. Due to the nature of this issue our storage scale units are expected to require significant recovery efforts to ensure all resources return in a consistent state. Note that any new allocations for resources will automatically avoid the impacted scale units. If your workloads are protected by Azure Site Recovery or Azure Backup, we recommend to either initiate a failover to the recovery region or recover using Cross Region Restore.
Customers using services that are zonally-aware may consider failing out of the impacted zone, physical zone AZ-03. Note that physical zones are mapped to logical zones in your Azure subscription, Refer to: https://learn.microsoft.com/rest/api/resources/subscriptions/check-zone-peers.
This message was last updated at 12:21 UTC on 08 February 2023