A long winter power cut: what to do at home before and after

What to do once a storm warning is out

The Estonian Environment Agency issues storm warnings ahead of most autumn and winter fronts, usually with a day or so of notice. That window is enough to check torches have batteries, phones and power banks are charged, and there's a way to boil water without electricity, such as a gas hob or a camping stove kept for this purpose.

If your home relies on an electric pump for water, such as many houses on a private well, fill a few containers in advance. Flats on district heating are less affected since the heat itself doesn't depend on your own electricity supply, but the circulation pumps and thermostats in the flat still need power.

Check where your consumer unit is and that you know which switch does what. In an older panel flat or a 1930s wooden house this is often a single row of unlabelled breakers, and fumbling for the right one by torchlight during a cut is not the moment to work it out for the first time.

What to unplug before the forecast cut

Storm-related outages often come with voltage surges, both when a line first fails and again when it's reconnected. Unplugging sensitive electronics beforehand is cheap insurance against a spike frying a circuit board.

Focus on things with delicate electronics and no real benefit from staying plugged in during a cut anyway: television, router, computer, printer, and any smart home hub. A chest freezer or heat pump, by contrast, should generally stay plugged in and switched on so it restarts on its own — see the sections below.

• TV, set-top box, router and computer
• Printer and other office electronics
• Kitchen appliances not actively in use: coffee machine, kettle, microwave
• Chargers and non-essential small appliances
• Any device already showing faults or an unusual smell when running

How to protect a heat pump in cold weather

An air-source heat pump depends on electricity to run its compressor and defrost cycle. During a cut in freezing weather, the outdoor unit stops defrosting and can ice up, and the indoor unit stops circulating warmth through the house. A few hours rarely causes damage, but a cut running into a full day in hard frost is worth planning for.

Leave the heat pump switched on at the unit itself rather than turning it off, so it resumes automatically once power is back rather than needing to be reset. Do not clear ice from the outdoor unit while it's without power — wait until it's running again and let the defrost cycle do the work, or brush off loose snow gently by hand.

If a cut is forecast to run long and the house has a backup heat source, such as a wood stove or fireplace, get it ready and have dry fuel to hand. For a house that leans on the heat pump as its only heating, a prolonged winter outage is also a reasonable moment to think about a backup power connection — that's electrical work best planned in advance, not decided during a storm.

Freezer and fridge during a longer cut

A full chest freezer holds its temperature for roughly a day and a half if left unopened; a half-empty one loses cold much faster because there's more air inside to warm up. A fridge is quicker still, generally holding safe temperature for only a few hours once the door stops being opened.

The single most useful thing you can do is stop opening the door. Every opening lets cold air spill out and warm air in, and this matters more than almost anything else during the cut itself.

If a cut is forecast and your freezer isn't full, consider grouping items together or adding bottles of water — ice reduces the air gap and helps everything hold its temperature for longer.

• Keep the freezer and fridge doors shut as much as possible
• Group food together or add frozen water bottles to fill empty space
• Know that a full freezer holds temperature roughly twice as long as a half-empty one
• Check food for ice crystals and cold-to-touch condition once power returns before deciding what's still safe
• When in doubt about a thawed item, don't refreeze it — use it promptly or discard it

The safe order for restarting appliances

When power returns after a longer cut, it sometimes comes back with a brief surge or a couple of on-off flickers as the network stabilises. Give it a minute or two of steady supply before plugging things back in, rather than reconnecting everything the second the lights come on.

Restart larger appliances first and one at a time, leaving a short gap between each: heat pump, boiler, fridge and freezer if they were unplugged, then washing machine or dishwasher if one was mid-cycle. Starting several large motors together draws a heavy simultaneous load that an older consumer unit may not appreciate.

Bring back sensitive electronics last: router, computer, TV. If anything trips a breaker the moment it's plugged back in, don't keep resetting and retrying — that's usually a sign the appliance took damage from the surge, or that the circuit itself has a fault worth investigating properly.

When to call an electrician straight after a cut

Most storm cuts end with everything simply switching back on. But a few signs are worth taking seriously rather than working around: a breaker that won't reset and hold, a burning smell from the consumer unit, sockets that feel warm, or lights that flicker even once other faults are ruled out.

These point to damage from a surge or a fault that a storm has exposed rather than caused, and they're worth having looked at rather than living with through the rest of winter. Electrical work in Harju county starts from 49 € per hour, and if a storm has finally proven a tired old consumer unit isn't up to the job, a full replacement is generally quoted as a fixed job from 350 €.

If your area sees a lot of storm-related cuts, that's also a reasonable prompt to check whether your consumer unit and wiring are up to modern loads before the next one, rather than only after something's already gone wrong.