Emergency Fixes for a Drain Blocked in Bad Weather

Heavy rainfall flooding a domestic drainage system

When the heavens open and the weather turns nasty, the last thing you want to deal with is a blocked drain. But it’s one of the most common—and most disruptive—problems UK homeowners and business owners face during bad weather.

Whether it’s torrential rain overwhelming gullies or snowmelt backing up your system, a blocked drain can lead to water damage, unpleasant odours, and even temporary closure of your premises. Knowing what to do in the moment can save you time, money, and a whole lot of stress.

In this blog, we’ll walk you through the emergency fixes you can apply when you find your drain blocked in bad weather, explain when it’s safe to DIY, and when it’s time to call in the professionals.

Why Drains Block in Bad Weather

Bad weather puts a huge strain on drainage systems. In particular, the following issues cause serious backups:

Fallen leaves and debris: During autumn storms, leaves, twigs, and dirt are washed into surface drains.
Silt and mud accumulation: Heavy rainfall can carry soil and grit into the system, leading to siltation.
Freezing temperatures: Cold snaps can cause standing water in pipes to freeze, leading to blockages or cracks.
Fat and grease buildup: Winter cooking habits (hello Christmas roasts!) lead to more fat entering the system, especially in commercial kitchens.
Collapsed or broken pipes: Tree roots and ground shifting during bad weather can damage pipes, reducing flow and causing backups.

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Clear Surface Debris

What to do: Wearing gloves, remove any visible debris (leaves, branches, mud) from grates and gullies.
Why it works: Sometimes the blockage is only surface-deep, and clearing it can relieve pressure instantly.
Safety tip: Watch out for slipping hazards and avoid standing water if electrical sockets or appliances are nearby.

Use a Drain Rod

What to do: If you have access to a drain rod, gently insert it into the affected drain to dislodge any blockage.
Why it works: Physical movement can break up compacted silt or leaves.
Safety tip: Always rotate clockwise to avoid unscrewing the rods inside the drain.

Boiling Water + Mild Detergent

What to do: Pour boiling water followed by a cup of mild washing-up liquid down internal kitchen drains.
Why it works: This helps clear fatty deposits, especially if you suspect a grease-based blockage.
Safety tip: Don’t use this on external drains, especially during freezing weather—it may refreeze and cause damage.

Plunger Tactic

What to do: Try using a plunger to clear internal sinks or toilets that are backing up.
Why it works: Creates suction and pressure to dislodge simple blockages.
Safety tip: Don’t overdo it. If it’s not shifting after 3–4 strong attempts, stop.

When to Avoid DIY Fixes

If the blockage is outside and water levels are rising rapidly
If raw sewage is present
If you’re unsure where the blockage is located
If you smell gas or suspect a broken pipe
If the blockage returns shortly after DIY attempts

These are all clear signs you need professional help.

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Temporary Solutions

Removing surface debris
Pouring hot water + detergent
Using a plunger or rods

Long-Term Solutions

High-pressure water jetting
CCTV drain surveys
Pipe relining or repairs
Root removal
Drain excavation and replacement

For lasting peace of mind, schedule a post-weather inspection to catch lingering issues early.

Why You Should Call Pro Drainage Group

When emergency strikes, Pro Drainage Group is on call to help homeowners and business owners across the South Coast, including blocked drains in Bournemouth and surrounding areas.

24/7 emergency response
Advanced CCTV drain inspections
Jetting and clearing services
Qualified, fully insured engineers
Trusted across Dorset and Hampshire

Whether you’re dealing with a drain blocked by rain, snow, or seasonal debris, we’re ready to respond fast and fix it properly.

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Call to Action

Don’t let a blocked drain ruin your day—or your property.

Call Pro Drainage Group now for emergency drainage solutions or book a free inspection to ensure your system is winter-ready.

Call us now or visit Pro Drainage Group to schedule your service.