A second cloud region will not save you if a hurricane cuts power to key services. Those services may include DNS, identity, ISP links, or the on-call team.
NOAA recorded 27 U.S. weather and climate disasters in 2024. Each caused losses of at least $1 billion.
Disaster planning must map weather, power, ISP, DNS, cloud, and staffing dependencies. Backing up data alone is not enough.
Build a US storm DR plan around real dependencies
A second region is not a recovery plan.
Your disaster recovery plan needs a recovery time objective (RTO). This is the longest downtime your business can accept.
It also needs a recovery point objective (RPO). This is the most data your business can afford to lose.
A payment system may need an RTO of 15 to 60 minutes. Its RPO may need to stay between 0 and 5 minutes.
An internal archive may tolerate days of downtime.
Declare a disaster when downtime will exceed the RTO. Also act when the RPO will be missed or a region is lost.
Act when critical responders cannot access the control plane.
Define service targets first
Classify services by business harm. Record the owner, RTO, RPO, data source, and failover method.
Also record the person who can approve action.
A 99.9% uptime SLA is not a recovery guarantee. It may provide service credits instead of restoring your app within 43 minutes.
Inventory every dependency
A useful dependency record has six fields: service, owner and alternate, location, authentication path, recovery method, and tested RTO/RPO. If any field is blank, the service is not ready for a regional outage.
Cloud resilience, disaster recovery, and business continuity solve related problems. They do not solve the same problem.
Resilience keeps a service running through smaller failures. It uses redundancy, health checks, spare capacity, and automated multi-region failover.
Disaster recovery restores systems and data after a larger disruption. It uses backups, replicas, recovery runbooks, RTOs, and RPOs.
Business continuity covers work beyond technology. It explains how staff serve customers, approve payments, and contact vendors.
It also covers work during office closures or local staff loss.
A resilient app can still fail its DR plan. An identity outage, DNS account issue, or unavailable incident commander can block recovery.
Critical dependency mapping needs more than an app owner and recovery method. List each power utility, generator, fuel source, and ISP.
List the DNS registrar, DNS provider, identity provider, and SaaS platforms. Include cloud accounts, payment processors, and key vendor contacts.
Name required staff roles and alternate work locations. Check whether alternatives share a metro area, carrier, account, admin, or storm risk.
Require ISP redundancy when lost connectivity would breach the service target. Test regional DNS loss alongside cloud loss, absent responders, and delayed vendor support.
Backup testing must prove more than data recovery. It must prove credentials, certificates, and remote runbooks still work.
Map US hazards to actual failure domains
Weather risk has a geography.
A U.S.-specific review should compare each location with seasonal threats. It should also include the location of every recovery dependency.
FEMA, NOAA, the National Weather Service, state alerts, and utility outage maps matter. Feed those alerts into the incident channel before a storm arrives.
| Area | Main seasonal threat | Likely failure | Planning response |
|---|
| Florida, Gulf Coast, Louisiana | Hurricanes, June to November | Evacuation, fuel and fiber outages | Fail over outside the coastal impact zone |
| Texas and Tornado Alley | Tornadoes, spring to early summer | Site, power, and ISP loss | Use remote runbooks and two carriers |
| California | Wildfire and heat, summer to fall | Evacuation and power shutoffs | Keep admin access out of state |
| Midwest and Northeast | Winter storms, November to March | Long road, power, and staffing loss | Test 24 to 72-hour remote operations |
Match seasons to response actions
At 96 hours before likely hurricane impact, freeze risky changes. Check backups, remote coverage, and emergency communications.
At 48 hours, pre-authorize responders. Verify DNS, cloud, and billing access without the office network.
Find hidden shared points
Multi-region compute fails if the same IdP blocks admin login in both regions. It also fails when one DNS account controls the change.
One hardware key or finance approver can also block recovery. Give emergency rights to at least two people in separate locations.
Test break-glass access every 6 to 12 months.
A regional outage test must follow every dependency
1. Detect
NOAA, NWS, utility, and provider alerts
2. Decide
RTO/RPO breach and named authority
3. Recover
Compute, data, DNS, identity, certificates
4. Confirm
Payments, monitoring, customers, staff
For weather outages, keep a short playbook for the first 24, 72, and 120 hours. Name the incident commander and a backup.
Define the threshold for remote work. Publish emergency access controls for cloud consoles, password vaults, DNS, billing, and support tools.
If offices close or roads are blocked, responders need approved devices. They also need out-of-band communication.
Do not depend on the corporate network.
Send staff a safety and work-status message. Send customers a plain-language update with the next review time.
Ask vendors to confirm their staffing, fuel, and connectivity status. This makes hurricane recovery planning an executable process.
Compare recovery architectures by failure
Choose for recovery, not branding.
| Model | Typical recovery target | Cost pattern | Failure it does not solve |
|---|
| Managed hosting or single VPS | Hours to days | Lowest monthly spend | Provider, account, or regional loss |
| VPS plus offsite backups | 2 to 24 hours | Low to medium | Manual rebuild and DNS delay |
| Multi-region public cloud | 15 minutes to 4 hours | Medium to high | Shared IdP, DNS, or approval chain |
| Hybrid or multi-cloud DRaaS | Minutes to hours | High, plus test effort | Bad runbooks or corrupted replicas |
Separate backups from replicas
A live replica is not a backup. It can copy deleted records, ransomware encryption, and broken infrastructure code.
Keep encrypted, immutable backups in a separate account. For critical systems, keep them outside the primary provider.
Test an ugly combined outage
A costly multi-region design is not required for a noncritical site. That site can be unavailable for several days with tested external backups. Document a rebuild procedure, keep DNS and backup access separate, and test recovery twice yearly.
What people ask
When should we activate a DRP?
Activate when an outage exceeds the written RTO. Also activate when data loss exceeds the RPO.
Activate if critical staff cannot work safely. Do not wait for a provider to call the event a disaster.
Can a cloud region really go down?
Yes. Regions can lose power, network access, control-plane functions, or capacity.
Multi-region systems do not fix shared DNS or identity. They also cannot replace account access or unavailable staff.
Is a cloud backup enough for disaster recovery?
No. A backup in the same account or region may be unreachable.
Keep an immutable copy in a separate account. Test restores every 6 to 12 months.
What is the difference between DR and business continuity?
Disaster recovery restores technology. Business continuity keeps the business operating.
Continuity also covers staff, vendors, customer support, facilities, and manual workarounds.
How often should a small business test failover?
Test a basic restore every quarter. Run a regional-outage exercise every year.
Systems with an RTO below one hour need tests every 3 to 6 months.
Does DNS failover work during an outage?
DNS failover works only when health checks and TTL settings are ready. DNS access, certificates, and standby services must also be ready.
Test from external networks. Do not test only from the office.
Put the plan on a seasonal test cycle
A plan earns trust during a drill.
Before hurricane, winter storm, or wildfire season, update the dependency list and call tree. Confirm disaster authority and DNS access.
Confirm cloud access, customer communications, and vendor escalation numbers. Check them outside normal business hours.
The essentials:
- Write RTO, RPO, and disaster triggers before choosing a hosting architecture.
- Separate DNS, identity, backups, authority, and staff access from the primary region.
- Match hurricane, wildfire, tornado, flood, and winter risks to dependency locations.
- Test a regional emergency with a cloud failure. Then fix the first dependency that blocks recovery.
Related sources
These articles can help you explore the topic in more depth:
