Frequently asked questions about emergency preparedness
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How much water should you store?
About 3 liters per person per day: 1.5 for drinking, 0.5 for cooking and 1 for basic hygiene. For 72 hours that's 9 liters per person, and double the drinking water if it's very hot. The calculator gives you the total for your home, pets included.
Why 72 hours?
It's what the European Union and many governments ask of every household: the time it can take emergency services to reach everyone in a major crisis. Some countries ask for more: Sweden, Norway and Switzerland, a week; Germany, up to 10 days.
How much does it cost to get prepared?
The basics for a 2-person household cost between €160 and €455 depending on what you already have and the brands. You don't need to buy it all at once: add a couple of things to every shop and in a few weeks you'll have it.
What do I do in the first minutes of a blackout?
Turn on a flashlight (not candles), check whether it's only your home, unplug sensitive devices, turn on the radio and text your family instead of calling. Don't open the fridge. Only call your local emergency number (112 in Europe, 911 in North America) if there's a real emergency.
What food should I store?
Food you already eat that doesn't need refrigeration: canned food, cooked legumes in jars or cans, pasta, rice, nuts, cookies, UHT milk. Rotate it: eat what you store and replace what you use. If you might be left without a way to cook, choose things you can eat without cooking.
How often should I check my supplies?
Every 6 months: check the dates, replace stored tap water, recharge the power banks and test the flashlights and radio. The inventory warns you about what's expiring soon.
Is keeping supplies hoarding?
No, if you build them up gradually with what you eat. Hoarding is buying too much once a crisis has started, which leaves other people without. Prepared in advance, your supplies help everyone.
What should I keep in the car?
Emergency warning equipment (in Spain, the connected V-16 beacon since 2026; elsewhere, whatever your country requires), a reflective vest, water, a blanket, a flashlight, a charger, some food and a window breaker within reach. In winter, snow chains and warm clothes.
Does the site work without internet?
Yes. Once loaded it's saved on your device and works offline; you can also install it as an app or use the Android app. Blackout mode darkens the screen and removes animations to save battery.
Where is my data stored?
Only on your device. There are no accounts, no ads and no analytics. What you type in the family plan or the inventory never leaves your phone or computer.