Data Centers

AWS: Multi-AZ ends at the regional boundary

AWS is not restoring Bahrain, and one zone in the UAE is gone entirely. It remains unclear what happens to data without a copy.

By Alec Chizhik September 19, 2026 3 min read

AWS: Multi-AZ ends at the regional boundary

AWS is ending its attempt to restore the Bahrain region after damage hit several Availability Zones. Multi-AZ does not protect against such region-wide outages; whether customer data without a backup is permanently lost remains unclear.

Key takeaways

AWS is ending the restoration in Bahrain. For data and resources that were not migrated, the provider sees no recovery option in Bahrain.
A second outage made the region unusable. After the initial incident, AWS had recommended migrating to other regions.
In the United Arab Emirates, mec1-az2 remains inaccessible. Work is continuing on the other affected zones.
Multi-AZ remains limited to one region. For a regional outage, the operator needs a copy outside the region.

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AWS is ending the restoration in Bahrain

Amazon Web Services cannot restore access to its cloud region in Bahrain. Reuters reported on 15 September 2026 that AWS will publish another update on the Bahrain operations in early 2027. AWS said the damage to the infrastructure had extended across several Availability Zones; for data and resources that were not migrated, the provider sees no recovery option in Bahrain.

From the initial incident to an unusable region

AWS said on 2 March 2026 that a drone strike in the immediate vicinity had damaged buildings and the power supply in Bahrain. According to AWS, firefighting work partly caused water damage. Reuters reported that day on damage to data centers in Bahrain and the United Arab Emirates.

After the initial incident in Bahrain in March, AWS recommended migrating to other regions. In April, another Availability Zone failed; that made the region unusable, Reuters reports.

In the Emirates, one zone remains inaccessible

In the United Arab Emirates, AWS cannot restore resources and data from the Availability Zone mec1-az2, a single zone within the region. In the other affected zones in the Emirates, AWS is continuing the work and replacing infrastructure there, as Reuters reports.

What does Multi-AZ do about region-wide damage?

What is Multi-AZ? Multi-AZ refers to running a service across several Availability Zones within one region. Availability Zones are separate locations within that region. Which data and components are stored redundantly depends on the service and its configuration. Distribution across zones protects against the failure of a single zone; a copy outside the region is not included.

AWS said: The damage exceeded the limits that regional and Multi-AZ services are designed for.

AWS, as quoted by Reuters

When a single damaging event affects several zones within a region, distributing resources across those zones is not enough to restore operations. To restore data and services, the operator needs a copy or an independent backup in another location.

AWS leaves the fate of the data unclear

The Next Web reported on 15 September 2026 that AWS has not said publicly whether customer data without a backup outside the affected zones is permanently lost.

AWS says it is helping Bahrain customers run their operations in other regions. Where backup copies exist, the provider helps customers resume operations; in other cases, AWS points to further solutions but gives no details.

Frequently asked questions

What is Multi-AZ?

Multi-AZ primarily protects against the failure of a single Availability Zone. A second region or an independent backup is additional protection and is not set up automatically by Multi-AZ.

What is still unresolved in Bahrain?

AWS cannot restore access to the Bahrain region and has announced another update for early 2027. Until then, it remains unclear what happens to data without a backup outside the affected zones.

How does AWS help customers with backup copies?

AWS says it supports operations in other regions. Where backup copies exist, the provider helps customers resume operations. For inaccessible data without such copies, AWS names further solutions but publishes no details.