A Power Grid Went Dark in 90 Seconds. Would Your Home Be Ready?

It wasn't an attack. It was the sun. Here is what the 1989 Quebec blackout teaches about protecting your electronics and your family, and the 3 Faraday cage mistakes most people make.

By the Steady Home Guide team, November 2026. A 4-minute read.

On March 13, 1989, a strong solar storm hit Earth's magnetic field. At 2:44 in the morning, Hydro-Québec's grid tripped. In about 90 seconds, around 6 million people lost power, in the middle of a Canadian winter.

Power came back after roughly 9 hours. That was the lucky part. Engineers have warned for years that a stronger event, natural or man-made, could damage the large transformers that keep a grid running. Those are custom-built and can take many months to replace.

90 secfor Quebec's grid to collapse in 1989

6 millionpeople left without power

~900 mihow far the 1962 Starfish Prime test reached, to Hawaii's streetlights

What an EMP actually does

An electromagnetic pulse (EMP) is a burst of energy that induces surges in wires and electronics. Long power lines act like giant antennas, which is why the grid is the most exposed part. Small devices that are unplugged and shielded have a much better chance.

That is the whole idea behind a Faraday cage: a closed metal box that keeps the surge outside. It works, but only if it is built right.

The 3 mistakes that make most Faraday boxes useless

The gasket. Many metal cans have a rubber or plastic seal on the lid. It breaks the metal-to-metal contact. Cover the seam with aluminum tape.
Devices touching the metal. Line the inside with cardboard or foam so nothing touches the walls.
Trusting the microwave. A microwave is built to block one frequency, and many leak around the door. It is not a reliable shield.

A quick home test: put a phone inside, close the lid and call it. If it rings, signals are getting in.

Quick self-check: is your family covered?

Do you have a sealed metal box with a backup radio and flashlight inside?

Could you get clean water if the taps stopped for 2 weeks?

Could you cook and stay warm with no power or gas?

Do you have basic medicine and first aid for a month?

4 to go…

Preparing is stewardship, not fear

David didn't face Goliath unprepared. He picked his five stones before he walked out. Many families of faith see readiness the same way: not as worry about the future, but as taking care of the people God put in their hands.

That is the angle of David's Shield, a guide written for Christian families. According to the seller, it brings together:

What the guide covers (per the seller)

Step-by-step protection for your home's electronics against EMP and blackouts
Off-grid ways to cover water, food and heat, drawing on Amish-style self-reliance
Bonus guides: a home pharmacy and off-grid home protection systems

Good fit if you…

want one plan that covers electronics, water, food and medicine, and like a faith-based approach.

Not for you if…

you only want a store-bought Faraday bag. The guide is a plan, not a gadget.

See the full plan on the seller's page

The seller lists it at $67, digital or printed (printed adds shipping). Sold through ClickBank, whose standard refund policy is 60 days.

See the family protection plan

Heads-up: the seller's page is long and dramatic in style. Check the current price and refund terms there before you buy.

Sources: NASA, "The Day the Sun Brought Darkness" (March 2009) on the 1989 Quebec blackout; U.S. Department of Energy and FERC reports on large power transformer lead times; historical records of the 1962 Starfish Prime test. This site is independent and is not affiliated with any government agency.