The first autumn storms — the September hour that beats the November flood
Autumn is when European windstorms and heavy rain return, and after a dry summer the ground sheds water instead of absorbing it. One hour of unglamorous work now is the difference between a flooded street being weather and being a problem.
Published late. This briefing was due on Thursday 10 September.
The season turns in September
Across most of Europe the calmest weather of the year is behind us by mid-September. The Atlantic storm track drops south, the first named windstorms arrive, and ground left dry and hard by summer sheds heavy rain instead of soaking it up. Overwhelmed drains plus a sudden downpour is what produces the flash flooding and localised power cuts that recur every autumn from Ireland to the Balkans.
This is not a forecast that your street will flood. It is a recognition that the cheapest time to prepare is now, before the first storm, not during it.
Fifteen minutes outside
Not all flood damage in homes comes from rivers. It is water that could not drain away fast enough and found the nearest low point — a doorway, a basement light-well, an air brick. The fixes are dull and quick:
- Clear the gutters and check one downpipe. A blocked gutter in a downpour sends water straight down the wall instead of into the drain.
- Clear the drain grate nearest your door. Summer leaves and grit block it exactly when you need it open.
- Move anything that floats or blows away — garden furniture, bins, anything light. In a windstorm these become the object that breaks a window.
The documents and the valuables
If water does get in, the losses that hurt most are the ones you cannot replace. Spend twenty minutes moving the irreplaceable up and out of the way — off the basement floor, out of the ground-floor cupboard. Passports, deeds, insurance papers and a paper list of key phone numbers in one grab folder kept high. Photos and sentimental items off the lowest shelf. And know where your water stop-tap and fuse box are before you need them in the dark.
If water does come, think electricity first
The rule is simple and it is about power, not the water. If water is entering and may reach sockets or the fuse box, switch the power off at the consumer unit — but only if it is safe and dry to reach. If it is not, leave it and get everyone to a higher, dry floor. Never stand in water to reach an electrical switch. A blackout is an inconvenience; a live socket in floodwater is not.
Check whether your address sits on the national flood-warning map — most European countries publish one — and sign up for the alert if it is offered. That is the difference between a few hours' notice and none.
One thing this week: clear the gutters and the nearest drain grate this weekend, and move your documents folder to a high shelf. One hour, and the first storm becomes weather rather than a crisis.
— Systems Fail Lab