Storm and flood: the calm plan for the week the river rises

Sign up for free flood warnings, learn the difference between an alert (flooding possible) and a warning (flooding expected), and never walk or drive through floodwater. Just 30cm of flowing water is enough to move your car (Environment Agency, checked 26 Aug 2026). Storms mostly ask you to tie things down and stay in.

First, the calm bit

Rivers rarely surprise anyone. Most flooding in the UK arrives after days of forecasts, named storms and official warnings, which means you nearly always get time to prepare, and the preparing is mostly free and mostly done sitting down.

The genuinely dangerous part of a flood is not the water in your kitchen, miserable as that is. It is people walking or driving into moving water. Follow the two rules in the “during” section below and a flood becomes an insurance job rather than an emergency.

This is the single best ten minutes of flood preparation available.

England: the Environment Agency sends free flood warnings by call, text or email; sign up at gov.uk/sign-up-for-flood-warnings, or by ringing Floodline on 0345 988 1188, which runs 24 hours (GOV.UK, checked 26 Aug 2026).
Scotland: register with SEPA’s Floodline service.
Wales: sign up through Natural Resources Wales.
Northern Ireland: there is no equivalent sign-up service listed; GOV.UK points to nidirect’s flood maps to check your risk.

One honest limitation: the service cannot warn you about surface water flooding, sometimes called flash flooding (GOV.UK, checked 26 Aug 2026), because it happens too fast to predict street by street. The government’s preparedness campaign also asks every household to check its flood risk through the national portals, even if you are nowhere near a river.

What the three warning levels mean

The wording matters, because each level asks for something different (GOV.UK flood warnings guidance, checked 26 Aug 2026).

Level	What it means	What to do
Flood alert	Flooding is possible	Prepare: be ready to follow your plan, gather documents and medicines, avoid driving through any floodwater
Flood warning	Flooding is expected	Take action: move loved ones, pets and valuables to safety, move to higher ground or an upper floor, turn off gas, electricity and water if it is safe to do so
Severe flood warning	Flooding could be a danger to life	Stay somewhere safe, be ready to evacuate, follow instructions from the emergency services, and call 999 if you are in immediate danger

An alert is the kettle-on stage. A warning is the moving-things stage. A severe warning means people, not possessions.

Preparing the house while the forecast is still just a forecast

Work top of the list down; stop when the warning level says stop.

Photograph your insurance documents, policy numbers and the rooms of your house as they normally look. Two minutes now saves weeks of claim arguments later.
Pack or check the go-bag: medicines, documents, chargers, a change of clothes. If you never leave, you have lost nothing.
Learn where your gas, electricity and water shut-offs are. The government’s preparedness guidance asks every household to know how to turn all three off.
Move what you love upwards. Photo albums, the laptop, anything irreplaceable goes upstairs or on top of wardrobes.
Charge everything and put the power bank by the go-bag.
Park the car out of the dip if you can, on higher ground away from the river.

During: the two rules that keep people alive

Never drive through floodwater. Just 30cm of flowing water is enough to move your car (Environment Agency, checked 26 Aug 2026). The water is always deeper and faster than it looks from the driver’s seat, and a stalled car in moving water is one of the most common ways floods kill. Turn around; the long way home is still the short way.

Never walk through it either. Floodwater hides lifted manhole covers, sharp debris and contamination, and fast-moving water can take an adult off their feet at surprisingly shallow depths. [VERIFY: the commonly quoted 15cm knock-you-off-your-feet figure — Environment Agency or Floodline]

Inside the house, if water is actually coming in: turn off the electricity at the fuse box if it is safe to reach dry-handed, turn off the gas and water too, and move everyone upstairs with the go-bag, phones and something to do. Do not stay on the ground floor to bail with buckets. If the water keeps rising or anyone is in danger, call 999.

After the water goes down

Ring your insurer before you clean anything; they will tell you what evidence they need and whether they can arrange help. Photograph everything, every room, every ruined item, before it goes in a skip.

Treat everything the water touched as contaminated: gloves and wellies for the clean-up, wash your hands before eating, and bin any food the water reached. [VERIFY: floodwater contamination and clean-up guidance — UKHSA flooding advice] Drying a flooded house takes far longer than feels reasonable, so pace yourself and take the offers of help.

If your tap water looks or smells wrong afterwards, or your water company issues a boil notice while the network recovers, the water guide covers exactly what to do.

Storms: mostly a tie-down exercise

The Met Office issues weather warnings up to seven days ahead for rain, thunderstorms, wind, snow, lightning, ice, extreme heat and fog, in three colours (Met Office, checked 26 Aug 2026). Yellow means possible low-level disruption, and is worth actually reading, because yellow covers a wide range. Amber means an increased likelihood of impacts, including power cuts and potential risk to life and property. Red means dangerous weather is expected and a risk to life is very likely; change your plans.

A storm gets a name when it could cause disruption or damage that might lead to an amber or red warning, and the Met Office shares the naming list with Met Éireann and KNMI, which is why some named storms arrive via Ireland or the Netherlands (Met Office, checked 26 Aug 2026).

Before the wind arrives: trampoline upside down and tied to something solid, garden furniture in or flat against a wall, bins where they cannot roll, gates latched, car away from big trees if you have the option. During: stay in, keep away from the windows during the worst of it, and save the trampoline rescue for tomorrow. If the power goes off, that has its own calm plan: the power cut guide, and 105 is the free number to report it.

What this asks of your body

A flood warning turns into a removals job at speed: sofas tipped upstairs, boxes of books carried up two flights, all of it in a hurry and probably in the rain. The clean-up afterwards is days of lifting, scrubbing and hauling. The five ready body tests take ten minutes and tell you whether your body is ready to move a living room before the water arrives.

Frequently asked questions

What is the difference between a flood alert and a flood warning?

A flood alert means flooding is possible, so prepare: documents, medicines, plan. A flood warning means flooding is expected, so take action: move people, pets and valuables, and turn off utilities if safe. A severe flood warning means possible danger to life (GOV.UK, checked 26 Aug 2026).

Can I drive through floodwater if it looks shallow?

No. Just 30cm of flowing water is enough to move your car (Environment Agency, checked 26 Aug 2026), and you cannot judge depth or current from the driver’s seat. Cars stalled in floodwater are a leading cause of flood deaths. Turn around and go the long way.

Is still floodwater safe to walk through?

Treat it as unsafe. Still water hides lifted manhole covers, sharp debris and steep drops, and it is often contaminated with sewage and chemicals. If you must move through shallow standing water on your own property, wear wellies, move slowly and wash well afterwards.

Where do I get sandbags?

It varies by council: some provide them during a flood, others expect you to buy your own from a builders’ merchant. Check your council’s website today, while it is dry, so you know which kind of council you have before you need the answer.

Scotland registers through SEPA’s Floodline, Wales through Natural Resources Wales, and both are free. Northern Ireland has no listed sign-up service; GOV.UK points to nidirect’s flood maps to check risk instead (GOV.UK, checked 26 Aug 2026). England signs up at gov.uk/sign-up-for-flood-warnings.

What do yellow, amber and red weather warnings mean?

Yellow: possible low-level impacts, some travel disruption, worth reading in full. Amber: increased likelihood of impacts, potentially including power cuts and risk to life and property. Red: dangerous weather expected and a risk to life very likely (Met Office, checked 26 Aug 2026), so change your plans.

We are nowhere near a river. Can we skip all this?

Check first. The government’s preparedness campaign asks every household to check its flood risk through the national flood maps, because surface water flooding after heavy rain can happen well away from rivers, and it is the one type the warning services cannot predict street by street.

Sources & review

Sign up for flood warnings, GOV.UK: the free England service, contact methods, Floodline number, links for Scotland, Wales and Northern Ireland, surface water limitation. Checked 26 August 2026.
Flood alerts and warnings: what they are and what to do, GOV.UK: the meaning of alert, warning and severe warning and the actions for each. Checked 26 August 2026.
Environment Agency flood warning press release, GOV.UK: “just 30cm of flowing water is enough to move your car”. Checked 26 August 2026.
Weather warnings guide, Met Office: yellow, amber and red warning meanings and the weather types covered. Checked 26 August 2026.
UK Storm Centre, Met Office: when and how storms are named. Checked 26 August 2026.
Get prepared for emergencies, UK Government: checking flood risk, knowing how to turn off gas, electricity and water, flood insurance. Checked 26 August 2026.

Reviewed by: TBC. Review date: 26 August 2026. Items marked [VERIFY] need checking before publication.