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The Storm Hit Aurora at 4 PM — Is Your Business Data Still There at 5?

Name: Cairitech IT Support and Services
Address: 2 Vata Ct #1, Aurora, ON, L4G 4B6, CA
Telephone: +1-416-361-1441

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Quick answer

Summer thunderstorms and heat-driven grid strain make July one of the highest-risk months of the year for unplanned power outages across the Greater Toronto Area — and a sudden cut to an unprotected server or workstation can corrupt files, erase unsaved work, and knock a business offline for hours.

The fix isn't luck; it's a layered continuity plan: an uninterruptible power supply (UPS) to ride out short cuts, automated off-site cloud backup so nothing lives in only one place, and a tested recovery plan so you know exactly how fast you can be back. Downtime is expensive — SMBs lose an average of roughly $10,000 per hour when systems go dark (Corporate Technologies, 2026). CairiTech, an Aurora, Ontario managed IT and cybersecurity provider, helps GTA businesses — including Architecture, Engineering, and Construction (AEC) firms with irreplaceable project files — put backup and continuity guardrails in place before the next storm rolls through.

3 min read posted on 07/05/26

Why do power outages spike in Ontario during the summer?

Power outages spike in summer because heat and storms hit the grid at the same time. Air-conditioning demand pushes electricity load toward yearly highs while thunderstorms, high winds, and lightning bring down lines — the exact conditions that produce sudden, unplanned cuts. Environment and Climate Change Canada consistently ranks July and August as Ontario's most active months for severe thunderstorms. For a business, the danger isn't the darkness itself; it's what happens to your hardware and data in the half-second the power drops.

What actually happens to your data when the power cuts out?

When power cuts out without warning, anything held in memory and not yet saved is gone, and an abrupt shutdown can corrupt open files, databases, and even the operating system. A server writing to disk at the instant of an outage can be left in an inconsistent state that takes hours to repair — or that quietly damages the file everyone opens the next morning. Traditional hard drives and RAID arrays are especially vulnerable to a hard stop.

A UPS (uninterruptible power supply) is a battery unit that sits between the wall and your equipment, giving servers and workstations enough runtime to shut down cleanly — or to keep running through a brief cut.

How much does downtime really cost a small business?

Downtime costs a typical small business somewhere between $1,000 and $10,000 per hour once you add lost productivity, lost revenue, recovery labour, and reputational damage. Industry estimates put the average SMB downtime event at roughly $8,000 per hour, and most businesses experience more than one a year. For an AEC firm mid-deadline, a lost afternoon can mean a missed submission or an idle site crew being paid to wait.

What's the difference between a backup and a continuity plan?

A backup is a copy of your data; a continuity plan is how fast you can actually use that copy to get running again. Both matter, and they are not the same thing.

Backup Only

What it protects:

Your files

Recovery speed:

Hours to days (manual restore)

Test frequency:

Often never

Power protection:

None

Ransomware-safe:

Only if backups are isolated

Full Continuity Plan:

What it protects:

Your files + your ability to operate

Recovery speed:

Minutes to hours (defined RTO)

Test frequency:

Regularly test-restored

Power protection:

UPS + failover included

Ransomware-safe:

Isolated, versioned copies

The industry shorthand is RTO (recovery time objective) — the maximum time you can be down before it hurts — and RPO (recovery point objective) — how much data you can afford to lose. Choosing those two numbers is where a real plan starts.

What should a GTA business do before the next outage?

Put four layers in place before storm season peaks:

UPS units on every server and critical workstation, sized at minimum for a clean shutdown.
Automated off-site backup following the 3-2-1 rule: three copies, two types of media, one off-site (cloud).
Versioned, isolated backups so ransomware can't reach and encrypt your recovery copies.
A written, test-restored recovery plan with named RTO/RPO — because a backup you've never restored is a guess, not a safety net.

Microsoft 365 and other cloud tools help, but they are not a backup by default: under the shared-responsibility model, retention and recovery of your data are still your responsibility.

You can't stop a thunderstorm from rolling over Aurora, Vaughan, or Markham — but you can decide whether it costs you an afternoon or barely registers. Explore our managed IT services and security solutions to see how the layers fit together. Book your free discovery call with CairiTech today and we'll pressure-test your backup and continuity plan before the next storm does.

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Frequently asked questions

Does a UPS replace a generator?

No. A UPS bridges seconds to minutes so equipment shuts down cleanly or rides out a brief cut; a generator covers longer outages. Many GTA businesses pair a UPS for graceful shutdown with cloud backup for true recovery.

Isn't Microsoft 365 already backing up my data?

Not fully. Microsoft 365 keeps the service running but operates on a shared-responsibility model — accidental deletion, ransomware, and retention gaps are your responsibility, which is why a dedicated backup still matters.

How often should backups run?

For most businesses, at least daily; for firms with heavy daily changes — like active AEC project files in Revit or AutoCAD — continuous or hourly backup keeps your recovery point tight.

How do I know my backup actually works?

Only by test-restoring it. A backup that has never been restored is unproven; scheduled test restores are the difference between confidence and hope.

Written by the Cairitech team — Greater Toronto Area managed IT and cybersecurity specialists, serving Ontario businesses (including AEC firms) since 1990. Head office: 1-2 Vata Court, Aurora, ON. Phone: +1 (416) 361-1441.

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