Leaving for August holidays — the six-item checklist that prevents the worst homecoming surprise
Most European households leave home empty for 1-3 weeks in August. Most blackouts and water-supply failures that month happen to homes with no one inside. Six pre-departure actions that take 30 minutes total and prevent the most common homecoming disasters.
The August problem most households never think about
Across the EU, August holiday departures peak in the first two weeks of the month. Millions of homes sit empty for 1-3 weeks. Most household preparedness assumes you are at home when something goes wrong. In August, for many EU households, the opposite is true: when something goes wrong, no one is there.
The most common August homecoming disasters, by frequency in insurance company data:
- Water leak that ran for days. Burst pipe, failed washing machine seal, garden tap left dripping. Cumulative damage: €2,000-50,000.
- Freezer/fridge failure with food spoilage. Power outage during heatwave + sealed apartment = 2 weeks of rotting food when you open the door. Cleanup cost: significant, smell: persistent.
- Heat damage to plants, paint, electronics from sealed apartment in 38°C exterior. Particularly top-floor apartments and west-facing rooms.
- Mail/parcel theft signaling vacancy. Stacked mail = "no one home" sign.
- Plant death. Less catastrophic but emotionally heavy for many.
Six pre-departure actions (30 minutes total)
These are the actions every household leaving for 5+ days should complete on departure day or the day before.
- Shut off the main water supply at the mains valve. Typically located in the kitchen under the sink or in a utility cupboard. Turn it off, then run a tap until empty. Catastrophic water damage prevention is single highest-leverage action. €0 cost, 2-minute task. Most households never do it.
- Set the thermostat / AC appropriately for an empty home. Heating in winter: 5-7°C above zero (prevents pipe freezing). Cooling in summer: 28°C (prevents catastrophic interior temperatures while saving energy vs leaving AC fully on). Most thermostats have an "Away" mode.
- Unplug non-essential electronics. TVs, computers, microwaves, decorative lighting. Reduces fire risk and vampire power draw. The fridge stays on (unless you're emptying it).
- Empty the bottom of the fridge and freezer of anything perishable. Even with the power on, if you don't open the door for 2 weeks, the bottom shelf contents go bad. Worst case: power outage during heatwave + sealed unit. Best protection: clean it out before departure.
- Forward your mail OR set up a neighbor pickup arrangement. Even just a neighbor checking once a week and bringing the mail inside prevents the stacked-mail signal. Tell them which window faces theirs as a "I'm home" indicator.
- Set one lamp on a timer for evening hours. €5 mechanical timer plug at any hardware store. 19:00-23:00 cycle. Indistinguishable from "someone is in the kitchen" from outside.
What this is not
This is not advice that you will face catastrophe on holiday. The vast majority of holiday departures end with everything fine. The point is: the six actions cost €5-10 (timer + maybe a roll of tape) and 30 minutes. The cost of NOT doing them, in a year when a pipe bursts on day 3 of a 14-day absence, is irrecoverable.
The mains-water shutoff alone justifies the whole list. Insurance company data consistently shows it as the single highest-leverage household resilience action a vacationing family can take.
One thing this week: find your main water shutoff valve. If you don't know where it is — it is the most likely thing that will save you money on holiday. Locate it now, when you have time. Test it (turn off, run tap until empty, turn back on). Practice it.
— Systems Fail Lab