It starts with a flicker. The air conditioning hums down, the Wi-Fi router blinks out, and suddenly your entire street is very, very quiet. ⚡ During a heatwave, Europe's power grids run closer to their limits than most people realise — millions of AC units, fans and fridges all pulling maximum load at once, transmission lines sagging in the heat, power plants struggling with warm cooling water. The massive Iberian blackout showed just how fast "fully modern country" can turn into "no lights, no payments, no petrol" — and how unprepared most households were. (Heatwaves getting to you in general? Here are 12 places in Europe where you can escape the summer heat.)
The good news: you don't need a bunker or a diesel generator. You need to understand what fails, in what order — and about 30 minutes of preparation. Here are the 9 things that go down first when the grid does, and the simple plan that keeps a blackout at the level of "inconvenient story" instead of "genuine emergency". 🔦
⏱️ The First 60 Minutes: What Fails Immediately
1. The lights — and every light switch reflex you have 💡
Obvious, yes. But here's what people actually discover in minute one: their only working light source is a phone torch that eats 20% battery per hour — battery they'll desperately need later for information and communication. If the blackout hits at night, stairwells, basements and bathrooms become genuinely hazardous, and candle-related fires spike during every major outage. A dedicated torch — one per household member, stored where you can find it in the dark — is the single cheapest piece of blackout resilience there is. A headlamp is even better: hands free for carrying things, cooking, or holding a child's hand.
2. Card payments, ATMs and shop tills 💳
This one shocks people every single time. No power means no card terminals, no contactless, no BLIK, no Apple Pay — and most ATMs go dark too. Within an hour, the only shops still selling are the ones accepting cash, and the queues in front of them say everything. During the Iberian outage, people with a few banknotes at home bought water, bread and batteries; people with platinum cards bought nothing. Keep a modest cash reserve at home in small denominations — big notes are useless when nobody has change. (Speaking of what's in your wallet: here's what's worth knowing about secure card wallets.)
3. Mobile network and the internet 📶
Cell towers have backup batteries — typically good for one to a few hours. Then they die, one by one, and with them go your calls, your messengers and your ability to check what's actually happening. This is why old-school FM/DAB radio remains the official emergency information channel in most EU countries: it keeps broadcasting when everything else is down. A battery or wind-up radio costs little and turns "terrifying silence" into "okay, they say power is back in six hours". Agree on a family meeting point in advance, because "I'll just call you" is not a plan when the network is gone.
🕒 The Slow Burn: Hours 2–12
4. Your fridge and freezer 🧊
The rule of thumb: an unopened fridge keeps food safe for about 4 hours, a full freezer for 24–48 hours. In a 35°C heatwave apartment, those numbers shrink fast. The single best move is also the simplest: don't open the door. Every peek costs you cold air you can't replace. If you know an outage is likely (utilities increasingly warn about rolling blackouts during heat peaks), freeze bottles of water in advance — they hold the temperature down and become drinking water as they melt.
5. Water pumps — yes, your taps can stop too 🚰
If you live above roughly the 4th–5th floor, your water pressure probably depends on electric booster pumps. When they stop, so do your taps and your toilet cistern. Houses with well pumps lose water immediately. Filling a few large bottles and the bathtub at the first sign of trouble is a classic for a reason — the standard emergency recommendation is around 3 litres of drinking water per person per day, plus water for hygiene and flushing.
6. Lifts, garage doors and electric gates 🚪
Every major blackout comes with the same statistic: hundreds of people trapped in lifts. If the grid is flickering during a heat peak, take the stairs — being stuck in a metal box at 40°C is dangerous, not just unpleasant. And a detail almost everyone forgets: do you know how to open your electric garage door or gate manually? Find the release mechanism today, not when your car is trapped inside and the frozen food is in the boot. Speaking of cars in summer — here are 12 everyday items that won't survive summer in your car.
🔦 Light That Doesn't Care About the Grid: Peli Torches
Peli builds lights for firefighters and industry — which means they survive drops, heat and years in a drawer, and switch on when it matters. For a home blackout kit, one per person is the golden rule.
🌒 The Long Haul: Day Two and Beyond
7. Refrigerated medication 💊
Insulin, certain biologics, some antibiotics and eye drops — for millions of Europeans, the fridge isn't about food, it's about medicine. Most refrigerated medications tolerate short excursions to room temperature, but "room temperature" in a heatwave flat can be 35°C, which is a different story entirely. If you or someone in your household depends on cold-chain medication, a cooler with pre-frozen packs should be part of your kit, and you should know your medication's actual temperature tolerance before you need that knowledge. We've covered the details in our guide on how to travel with medication that needs refrigeration — the same rules apply when the fridge dies at home.
8. Petrol stations ⛽
The fuel is right there in the underground tanks — but the pumps that lift it are electric, and so are the tills. During extended outages, working petrol stations become scarce and the queues become legendary. The old road-trip rule applies to blackout resilience too: treat half a tank as empty. An EV with a decent charge is actually an asset here — many models can power devices from their battery — but a nearly-empty one is a very expensive paperweight.
9. Air conditioning — and that's the truly dangerous one 🥵
Here's the brutal irony: blackouts are most likely during extreme heat, which is exactly when losing cooling is most dangerous. Heat is Europe's deadliest weather phenomenon, and a blackout during a 40°C spell turns flats — especially top-floor ones — into ovens. Know the passive playbook: shutters and curtains closed during the day, windows open at night, wet towels and cool showers, move to the lowest floor, and check on elderly neighbours — they are statistically the most at risk and the least likely to ask for help.
✅ The 30-Minute Prep Plan
Half an hour, one shopping list, and you're ahead of 90% of households:
- Minutes 0–5: Light. One torch or headlamp per person + spare batteries, stored in a fixed, known spot. Test them today.
- Minutes 5–10: Power. Charge every power bank you own to 100% and keep one permanently topped up. Phones switch to low-power mode the moment an outage starts. (Flying soon? Check the power bank rules for carry-on baggage.)
- Minutes 10–15: Cash. Withdraw a sensible reserve in small notes and coins. Store it somewhere safe but accessible.
- Minutes 15–20: Water & food. A few 5-litre bottles, plus a shelf of no-cook food: tinned fish, crackers, nuts, UHT milk. Manual can opener — the eternal blackout punchline.
- Minutes 20–25: Information. Battery or wind-up FM radio. Write key phone numbers on paper — nobody remembers numbers anymore, and your contacts live in a phone that will eventually die.
- Minutes 25–30: Documents & meds. IDs, insurance papers, a basic first-aid kit and any critical medication in one grab-ready, waterproof container — blackouts love to coincide with the storms that cause them.
🛡️ One Grab-Ready Box: Waterproof Peli Micro Cases
Documents, cash, spare keys, meds, a power bank — the whole point of a blackout kit is that it's in one place, sealed against water and dust, ready to grab in the dark. That's literally what IP67-rated Peli micro cases were built for. (What does IP67 mean exactly? We explain it here.)
Lights Out, Head Up 💡
A blackout is not the apocalypse — it's a stress test. The households that pass it aren't the ones with the most gear; they're the ones that spent half an hour thinking ahead: light you can find in the dark, cash that works when terminals don't, water before the pumps stop, a radio that tells you what's going on, and one sealed box with the things that matter. Do the 30-minute plan this week, put the kit on a shelf, and then forget about it — until the night your street goes quiet and you're the only flat with the lights on. 🔦
