Guide · Risks in France

Flooding: what to do, before, during and after

One reflex is enough to avoid most tragedies: never cross moving water. The rest is prepared in advance.

Updated September 18, 2026Reading: 8 minOfficial sources cited at the bottom of the page
In brief

Before an announced flood, move furniture and papers to safety, and watch the warnings for your area. During, stay away from watercourses and never try to cross a flooded road, on foot or by car: 30 cm of moving water is enough to destabilise a vehicle. After, only restore power once installations are dry, and report the claim to your insurer as soon as possible.

Before: preparing

According to Civil Protection, when a flood is announced or likely:

During: life-saving actions

After: cleaning and reporting

Once the state of natural disaster is recognised by decree in the Journal officiel, contact your insurer: the maximum reporting deadline is 30 working days after this publication, with a legal deductible of 380 euros for individuals.

The case of the car

Never try to restart a car that's been flooded: this can worsen electrical and mechanical damage. Contact your insurer before any handling. A car is generally considered unrepairable once water has risen above the seat base, a level beyond which many electronic parts are affected.

Mistakes to avoid

With LASTLINE

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LASTLINE can help you prepare for a flood before it happens:

LASTLINE doesn't replace an insurance claim or a natural disaster decree.

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Frequently asked questions

Can you drive through a flooded street?

No, never. Civil Protection is clear: never try to cross a flooded watercourse or road, on foot or by car. 30 cm of moving water is enough to destabilise a vehicle.

What should you do if your car has been flooded?

Never try to restart it: this can worsen electrical and mechanical damage. Contact your insurer to assess the damage before any handling.

How long do you have to report a flood claim to your insurer?

The maximum deadline is 30 working days after the official recognition of the natural disaster is published in the Journal officiel. However, it's recommended to notify your insurer as soon as possible, without waiting for this publication.

What's the deductible in a natural disaster?

The legal deductible applicable to the natural disaster guarantee is set at 380 euros for individuals, a regulatory amount identical regardless of the insurer.

Sources

  1. Civil Protection (Ministry of the Interior), Flooding.
  2. Vigicrues, National flood warning map.

Deductible amounts and reporting deadlines are set by current regulations and may change: check current terms with your insurer.