Water leak or electrical fault at home: a quick step-by-step action guide

By the Málaga Urgente team · Published 1 October 2026 · 10 min read

First, safety: the risk you cannot see

Before trying to stop a leak or fix a power cut, ask yourself three questions: is there a risk to people?, is there water near electrical installations? and is there a burning smell, smoke or sparks? If the answer to any of them is yes, safety comes first, and the rest can wait a few minutes.

If you see smoke or flames, leave the property and call 112. If there is water on the floor and the fuse box is in a wet area, do not go in to switch off the breaker barefoot or with wet feet: call an electrician or 112. In all other cases, the steps below will help you control the situation.

Water leak: what to do in the first ten minutes

1. Close the main stopcock. It is usually near the meter, at the entrance to the property, in the kitchen or in a bathroom cupboard. Turn it until it is fully closed.
2. Cut the power if there is water near electricity. Switch off the main breaker at the fuse box before stepping into a wet area with sockets or plugged-in appliances.
3. Drain the pipe. With the stopcock closed, open a tap on the lowest part of the property so that the remaining water runs out and the pressure drops.
4. Limit the damage. Mop up the water with towels, remove rugs and furniture, and protect electronic devices.
5. Document it. Take photos and videos of the source and of the damage before cleaning up. They will be useful for insurance and for the technician.
6. Notify. If the water may affect neighbours or shared areas, tell the manager and the affected neighbours.
7. Call the plumber. Explain where the leak is, since when, what you have closed, and send the photos on WhatsApp.

If the leak is small, such as a drip from a trap or a flexible hose, you can place a container and close the shut-off valve of the affected appliance until the technician arrives.

Where your stopcock is and why you should test it today

Most people discover that they do not know where the stopcock is just when they need it. Spend five minutes finding it and testing it:

• Look for the main stopcock next to the meter, at the entrance to the property, in the kitchen or in the bathroom.
• Check that it turns easily. If it is seized, do not force it: have it replaced before an emergency.
• Also locate the shut-off valves for each bathroom, kitchen, washing machine, dishwasher and water heater.
• Note their positions and send them to whoever may need them in your absence, such as a relative or a neighbour.

In buildings with a residents' community, ask the manager where the building's main stopcock is, in case the problem is in shared areas.

How to know if you have a hidden leak

Not all leaks can be seen. Some have been going on for weeks or months inside a wall or under the floor. These signs should put you on alert:

• The meter turns even though all the taps are closed and no appliance is using water.
• Damp stains that grow, paint that blisters or floors that swell.
• The sound of running water when nothing is in use.
• A water bill that rises for no reason.
• A persistent damp or mouldy smell in a room.

The simplest test is to close all the taps, note the meter reading, wait an hour without using water and check it again. If it has changed, there is a loss. Finding it without breaking more than necessary is a specialised plumbing job, and we have a specific guide for ceilings: how to find the source of a leak.

Leaks in buildings: community, neighbours and insurance

When there is a leak in a block of flats, the first question is whose fault it is. The pipes inside the home are usually the owner's responsibility, while the soil pipes and the building's main network are usually shared elements. Finding the exact source before opening up decides who must pay for the repair.

If there is damage in your home or in a neighbour's, tell your insurer. The Spanish Insurance Contract Law sets a maximum of seven days to report a claim, unless your policy sets a longer period. The sooner you do it and the better documented it is, the easier the processing. Keep the photos, the invoices and, if possible, the damaged part.

If the damage affects a neighbour, coordinate quickly: a well-completed water damage report and a detailed invoice for the origin of the fault usually save arguments.

Electrical fault: why the residual-current switch trips and what to do

To understand what is happening it helps to know the three basic protections in a home fuse box:

• Power control switch (ICP): limits the contracted power. It trips when that is exceeded.
• Circuit breakers: protect each circuit against overloads and short circuits.
• Residual-current device (RCD): protects people by detecting current leaking to earth, which could cause a shock.

When the residual-current device trips, follow this procedure:

1. Identify what has tripped. If it is the RCD or a specific circuit breaker, you will know whether the problem is general or in one circuit.
2. Unplug everything connected to the affected circuit, or in the whole home if the main RCD has tripped.
3. Reset it once. If it stays on, the fault was in an appliance.
4. Plug in appliances one at a time. When it trips again, you will have found the culprit: an appliance leaking current, a damaged extension lead or a damp socket.
5. If it trips with nothing plugged in, the problem is in the installation: damp in a box, a damaged cable or a faulty circuit. Call an electrician.

There are two things you should never do: reset the RCD again and again, and bypass or upgrade a protection so that it stops tripping. Protections trip to prevent an accident or a fire. For more information on how we check these cases, see our electricians service.

Total or partial power cut: how to tell whose problem it is

If you lose power, first look at what is happening in the rest of the building or in the street. If the neighbours are also in the dark, the fault is probably in the distribution company's network, and it is worth contacting them. If only you have lost power, check the fuse box: if the ICP has tripped, you may have exceeded the contracted power; if another element has tripped, follow the procedure above.

If only part of the home fails, it is usually a tripped circuit, a loose connection in the fuse box or a damaged cable. If appliances have been damaged or the protections have tripped after a storm, there may have been a surge. In that case, unplug delicate equipment until the installation is checked and consider fitting surge protection.

Burning smell, sparks or hot sockets: act now

These symptoms indicate a fire risk and cannot be left for tomorrow:

• Switch off the main breaker at the fuse box.
• Unplug the appliances involved, if you can do so safely.
• Do not use water on an electrical fire. If you have a CO2 or dry powder extinguisher, use it; if the fire spreads, leave the property and call 112.
• Do not switch the power back on until an electrician has checked the cause.

The most common causes are loose connections, undersized cables that heat up, overloaded power strips or ageing sockets. An electrician locates the exact point and repairs it.

Water leak and a wet fuse box: the most dangerous case

When water reaches the fuse box or the sockets there is a risk of electrocution. If the floor is wet and you have to go near the fuse box, do not go in to switch off the main breaker without protection: it is better to call an electrician or 112. If the fuse box is dry and accessible, switch off the main breaker and wait before touching anything else.

Do not reconnect the power until an electrician has checked that the installation is dry and safe. Wet elements, such as junction boxes, switches and power strips, usually have to be checked or replaced.

Prevention: a home emergency kit and regular checks

• Locate and test the main stopcock and the shut-off valves for each appliance.
• Label the circuits in the fuse box so you know what each one controls.
• Keep a torch and a note with the phone numbers of the plumber, the electrician, the manager and your insurer to hand.
• Replace washing machine and dishwasher hoses every few years: they are a frequent cause of flooding.
• If your electrical installation is decades old, ask for a check of the fuse box and protections. You can find out more in our guide to the electrical certificate.
• If you go away or close a second home, close the main stopcock.

What is different on the Costa del Sol and the Axarquía

Three circumstances are worth bearing in mind in our area. First, heavy autumn rain can cause leaks, flooded garages and power cuts. Second, salty air speeds up the corrosion of fuse boxes, terminals and exposed pipes, especially in homes close to the sea. Third, second homes and holiday apartments spend long periods closed, and faults are discovered on return.

If your home is in Nerja, Torre del Mar, Vélez-Málaga, Rincón de la Victoria or any other area we cover, see the page for your municipality in our areas section.

When to call a technician and when it can wait

When you call, have the address to hand, what is happening, since when and what you have already done. We will confirm availability and a specific time before setting out. You can call us on 614 14 80 38 or message us on WhatsApp, and we will guide you to leave the property safe until we arrive. See our plumbers and electricians services.

Quick questions

Can I reset the residual-current switch several times in a row?

No. Reset it once after unplugging the appliances; if it trips again, there is a fault to locate and you should call an electrician.

Where is the main stopcock usually?

Normally next to the meter, at the entrance to the property, in the kitchen or in the bathroom. Check today where yours is and test it.

What do I do if the garage floods after a storm?

Do not go in if there is water near electrical installations. Tell the manager, switch off the garage power if it is safe to do so and check the drainage pump when it is safe.

Can I use water to put out an electrical fire?

No. Use a CO2 or dry powder extinguisher, or leave and call 112 if the fire spreads.

How long do I have to notify the insurer?

The Spanish Insurance Contract Law sets a maximum of seven days from when you learn of the claim, unless your policy sets a longer period. Notify as soon as possible.

Keep reading

• Rising damp and salt damp: a Costa del Sol guide
• Electrical certificate: what it is and when you need it