Is Your Failover Actually Tested? A Texas Storm-Season Checklist

Storm season in Texas runs from June through November, and the most dangerous months are still ahead. Severe thunderstorms, hurricanes along the Gulf Coast, and tornadic supercells across the I-35 corridor regularly knock out power, flood buildings, and take down internet service for days at a time. According to the National Centers for Environmental Information, Texas experienced 18 separate billion-dollar weather disasters between 2020 and 2025.

If your business has a failover plan, the only question that matters right now is whether you’ve actually tested it. Not reviewed it. Not talked about it in a meeting. Tested it by pulling the plug and watching what happens.

The Gap Between “We Have Failover” and “Our Failover Works”

Most businesses we talk to can point to some form of redundancy. A second internet circuit from a different ISP. A generator on the roof. Cloud backups that run every night. A documented business continuity plan in a binder somewhere.

None of that tells you whether your business will keep running when a storm takes out your primary systems.

Failover is a chain of dependencies, and the chain only works if every link has been validated under realistic conditions. Your secondary ISP circuit might use the same last-mile fiber path as your primary, meaning both go down when a utility pole falls. Your generator might start fine during a monthly test run but fail under sustained load because the fuel delivery contract lapsed. Your cloud backups might be current, but if you’ve never tested restoring a full environment from them, you don’t know whether the process takes two hours or two days.

The businesses that come through storms without major disruption aren’t the ones with the most expensive failover infrastructure. They’re the ones that tested what they had and fixed the gaps before the weather forced the issue.

Five Failover Tests to Run This Month

These tests range from simple to involved. Each one validates a different link in your continuity chain, and each one routinely exposes problems that would otherwise stay hidden until a real event.

1. Network Failover

If you have a secondary internet connection, test it by disconnecting your primary circuit. Don’t just check that the backup link is online. Verify that DNS resolves, VPN tunnels re-establish, VoIP phones reconnect, and cloud applications remain accessible. Time the switchover from disconnect to full functionality. If your business runs on Microsoft 365 or Azure services, confirm that authentication and file access work through the backup path.

Many businesses discover during this test that their “automatic failover” requires manual router intervention, or that the secondary circuit’s bandwidth is so limited that critical applications become unusable. Both are fixable problems, but only if you find them before the storm does.

2. Power Continuity

Simulate a power loss during business hours. Confirm that your UPS systems provide enough runtime for servers to shut down gracefully or for the generator to start and take over the load. If you have a generator, run it under full load for at least 30 minutes, not the five-minute idle test that most maintenance contracts cover.

Check your fuel situation while you’re at it. A natural gas generator needs a reliable gas supply, which can be disrupted during severe weather. A diesel generator needs fuel on hand and a delivery contract that guarantees resupply within a specific window. During Winter Storm Uri in February 2021, many Texas businesses with generators ran out of diesel because fuel trucks couldn’t reach them, and natural gas pressure dropped across the state.

Also verify what happens to your network equipment during a power transition. Switches, access points, and firewalls that lose power for even a few seconds can take 10 to 15 minutes to fully reboot and reconverge. If your UPS doesn’t cover network infrastructure, you may have power but no connectivity.

3. Application and Data Failover

If your disaster recovery plan includes cloud replicas or a secondary site, test the actual switchover. Bring up your critical applications from the backup environment and have staff perform their normal workflows. Can accounting close a period? Can operations process an order? Can the sales team access CRM records?

This test almost always reveals application dependencies that aren’t replicated. A database server might fail over cleanly, but the application server that connects to it has a hardcoded IP address that points to the primary site. Or a critical integration between two systems uses an API key that’s only configured in the production environment.

4. Data Replication Lag (Your Real RPO)

Your recovery point objective, the amount of data you can afford to lose, is only as good as your replication frequency. If your backups run nightly, you could lose up to 24 hours of work. If you use real-time replication, check whether it’s actually keeping up.

Run a simple test: create a file or database record in your production environment, wait the duration of one replication cycle, then check whether it appears in your backup. Compare the timestamp of the last successfully replicated data point against the current time. The gap is your actual RPO, and it may be larger than what your vendor’s dashboard reports. Replication jobs that fall behind due to bandwidth constraints or large data volumes often show “healthy” status while running hours behind.

5. Communication Chain

When your office loses power and internet, how does your team communicate? If the answer is “we’ll use Teams” or “we’ll send an email,” you don’t have a plan. Those tools require the same infrastructure you just lost.

Test your out-of-band communication. This means a phone tree, a text message group, or a third-party messaging platform that doesn’t depend on your corporate infrastructure. Verify that every person on the emergency contact list has a current phone number. Run a surprise drill: send the activation message and measure how long it takes to reach every team member and get confirmation back. If your managed IT provider has an emergency communication process, make sure you know how to activate it and that they can reach your designated contacts.

Where Untested Plans Actually Break

Having worked with businesses across Texas through multiple severe weather events, we see the same failure patterns repeatedly.

Single points of failure hiding in “redundant” systems. Two ISP circuits that enter the building through the same conduit. Primary and backup DNS hosted by the same provider. A cloud disaster recovery target in the same geographic region as the production environment. Redundancy on paper, single point of failure in practice.

Recovery time assumptions that don’t hold. A plan that says “recovery within four hours” but has never been timed. When a real incident forces the test, the actual recovery takes 18 hours because nobody accounted for the time needed to diagnose the failure, coordinate with vendors, and work through the restore sequence.

People problems. The one person who knows the recovery procedure is on vacation. The documentation references a server that was decommissioned last year. The emergency contact list has three wrong phone numbers. Staff panic and start improvising instead of following the plan, creating new problems on top of the original failure.

Physical infrastructure you forgot about. Server rooms in basements that flood. HVAC systems that can’t keep up when outside temperatures spike during a summer storm’s aftermath, causing thermal shutdowns. Roof-mounted satellite dishes and antennas that don’t survive high winds.

Building a Testing Cadence That Actually Sticks

The hardest part of failover testing isn’t running the tests. It’s doing them regularly enough that you catch problems introduced by changes to your environment. A network failover test you ran six months ago doesn’t validate the new firewall rules your team added last month, or the new SaaS application that requires specific DNS configuration.

Quarterly for full failover drills. Once per quarter, run a live failover test that simulates a real outage scenario. Rotate the scenario each quarter: power loss, internet outage, primary site unavailable, ransomware requiring a full restore.

Monthly for component checks. Test individual components on a rolling basis. Generator load test one month, network failover the next, communication chain drill the next.

After every significant infrastructure change. New firewall, new ISP, new cloud service, office move, server migration. Any of these can break failover paths that were working before.

Document everything. Record what you tested, what worked, what failed, how long the switchover took, and what you need to fix. This documentation becomes your evidence trail for compliance audits and insurance claims, and it’s the only way to measure whether your resilience is improving over time.

If you don’t have internal staff to manage this testing cadence, that’s a gap a managed IT partner can fill. Regular failover testing should be part of your IT operations, not something that gets pushed to “next quarter” indefinitely.

The Test You Can’t Afford to Skip

Storm season doesn’t wait for you to finish your continuity planning. The businesses that recover fastest from severe weather events are the ones that tested their failover systems, found the gaps, and fixed them before the forecast turned ugly. The ones that didn’t test are the ones calling their IT provider at 2 AM during a power outage, discovering for the first time that their backup generator won’t start or their cloud failover was never configured correctly.

If your last failover test was more than six months ago, or if you’ve never run one at all, this week is the time. Run the five tests above, document what breaks, and fix it before the next storm cell forms over the Gulf.