90 Day Blackout Warning: What It Means for Canada

Is a 90-day blackout coming? The 90 days is a Pentagon base plan, not a forecast. What was reported, what it means in Canada, and what to do.

You may have seen posts about a "90-day blackout warning." Here is what was actually reported, what it means for a household in Canada, and what to do about it. Short version: the 90 days is a planning target for US military bases, not a forecast, and no one has told Canadian households to expect a blackout that long.

What was reported

• The Pentagon plan. On October 25, Fox News Digital reported, citing internal documents, that the Pentagon is developing a requirement for every major US military base in the continental United States to keep essential operations running for at least 90 days without outside electricity, fuel or water. The effort is called FORTRESS.
• What is public. The Defense Secretary announced FORTRESS in a September 30 speech, with the goal that bases generate their own power. The documents behind the 90-day figure have not been made public, so the number comes from press reporting.
• The stated reason. A Pentagon spokesperson said the military does not want to rely on civilian infrastructure to run national defence. It is described as planning for the possibility of a major conflict, the way a hospital plans for backup power.
• The UK angle. Days earlier, on October 22, the British government launched a "Be Ready" campaign asking households to prepare for three days of disruption, with canned food, bottled water, a radio, power banks and cash.

What it means in Canada

On October 29, the federal government released a new national security strategy that, according to CTV News, calls for preparing for worst-case scenarios, including war. That is government-level planning. As of November 1, 2026 we have not found a Government of Canada, provincial or utility notice telling households to expect a 90-day outage. The Pentagon plan is about bases in the United States. Official Canadian household guidance has not changed: be ready to look after yourself for at least 72 hours.

That is still a real gap to close. Many households do not have 72 hours of water, food, light and phone power ready, and winter storms in Canada cause outages that last days, not hours.

Should you prepare for 90 days?

Not because of this headline. Buying months of food in a panic usually means waste and money spent on the wrong things. A better order of operations:

1. 72 hours first. Use the free 72-hour checklist and the outage planner to get your household numbers for water, food and battery.
2. Then one week. Winter ice storms are the usual reason for long outages. See how to prepare for a week-long power outage.
3. Then stretch if you want to. Some US agencies suggest a two-week water supply if you have room. Our water storage guide shows how to scale it.
4. Go deeper only on your own terms. If you want a longer pantry for peace of mind, our 90-day preparedness plan builds it in phases, starting with 72 hours, and our 30-day food plan covers food you will actually eat.

Backup power: size it, do not overbuy

For most outages, the things that matter are a phone, a router, lights and sometimes a fridge or CPAP. Work out your watts first with our sizing guide, then compare options on the Canadian power station guide. A power station is a backup for essentials, not a replacement for home heat.

How to read the next headline

• Check who is speaking: a government, grid operator or utility beats a social media post.
• Look at the region. A US base plan or a Mid-Atlantic grid order does not describe your province.
• Look at the verb: "plans for" and "could" are not the same as "will" or "has ordered households to."

We keep our grid warnings roundup updated as reports change. If this story changes, we will change this page.

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