How to Prepare for a Cyclone: A Townsville Plumber's Guide

Cyclone season in Townsville brings torrential rain, gusting winds, and flooding, which can severely damage your home, your plumbing, and your sense of safety. Knowing what to expect and preparing ahead can save you thousands in damage and give your family peace of mind. 

This guide walks you through the key risks your home faces and the steps you can take to be ready before, during, and after a cyclone hits.

TL;DR

• Know the risks. Cyclones bring heavy rain, strong winds, and flooding; reactive soil and low-lying areas can cause pipe damage and sewage backup.

• Pre-season checks. Test the main water shutoff, gutters, downpipes, rain heads, sump pumps, and Overflow Relief Gullies (ORG) before storms.

• Clear water paths. Remove leaves, debris, or blockages from gutters, downpipes, and outlet pipes to prevent flooding.

• Secure outdoors & roofs. Anchor or move garden items, and check eaves and soffits to reduce wind damage.

• Protect utilities. Turn off the electric hot water if flooding is possible, shut off the gas lines, and ensure sump pumps work with backup power.

• During the cyclone, stay indoors, limit water use, avoid taps, contain leaks, protect valuables, and never go outside during the eye.

• After the cyclone, inspect hazards, flush and test water, check plumbing, prevent mould, document damage, and call a licensed plumber if needed.

Know Your Risk in Townsville (And What 'Cyclone-Ready' Means)

Townsville is one of Australia's highest cyclone-risk zones. The cyclone season runs from November to April, with most cyclones occurring between January and March. This is the same time as the wet season, so you must ensure your home and plumbing can withstand extreme rain, flooding, and storm surge. 

When a cyclone hits, there are three main risks that directly affect your home:

1. The 100,000-Litre Rain Load

In Australia, cyclones are classified by wind speed. A Category 3 cyclone, with wind speeds of 165–224 km/h, is common in Townsville and can dump around 400–500 mm of rain over 48 hours. On a 200 sqm roof, this amounts to 100,000 litres of water that must flow through your gutters and downpipes.

If gutters are partially blocked with leaves, if downpipes are undersized, or if they discharge poorly, water has nowhere to go. It overflows onto the eaves, soaks the ceiling insulation, and can reach light fittings and wiring. This increases the risk of water damage, electrical hazards, mould growth, and structural weakening of ceilings or walls. 

2. Townsville's Reactive Soil

Many Townsville suburbs sit on highly reactive clay soil, often called black soil.

Here is what that means during cyclone season:

• Before heavy rain, the soil dries, shrinks, and cracks. This movement stresses underground pipes, especially older terracotta or earthenware lines.
  
  
• After heavy rain, the soil absorbs water and expands rapidly. Reactive clay can exert very high upward and sideways pressure as it swells.
  
  

That movement can crack brittle pipes and dislodge joints, causing leaks, flooding, and water intrusion into walls, floors, and foundations.

3. Backflow and Storm Surge

If you live in low-lying areas like South Townsville or Railway Estate and are close to the coast, you may face storm surge. 

When a cyclone hits, the strong winds push seawater or river water towards the land. If the water level outside rises above the pipes and drains in your home, it can flow back. This means that toilets, shower drains, or floor drains can start spilling seawater or dirty water into your house, causing flooding, damaging floors, walls, and carpets, and creating serious hygiene risks.

To deal with all the above risks, your home and plumbing need to be cyclone-ready. That means making sure water can drain away quickly, your roof and downpipes are secure, and backflow protection is in place where needed. 

In the following sections, we'll guide you step by step on exactly what to check and do to keep your home safe when a cyclone hits.

What To Do Before Cyclone Season

Locate and Test Your Main Water Shutoff

Water damage doesn't always come from rain. If a tree falls on an external tap or exposed pipe, or a pipe bursts under pressure, thousands of litres of water can flood your home. 

Before the season begins, locate your main shutoff valve, usually near the water metre at the front of your property under a green or black plastic lid. In Townsville, mineral-rich water can make valves stiff or stuck over time. Gently use pliers or multigrips to check if it turns. Do not force it – if it won't move, have a plumber replace it before cyclone season. 

Knowing your valve works in advance means you can shut off the water quickly if a pipe bursts during heavy rain.

Check Gutters 

Walk around your house and tap your PVC downpipes. A hollow sound usually means water can flow freely, while a dull thud indicates the pipe may be clogged with leaves or debris. If you can safely remove the blockage from the ground, do so carefully. If it's too high to reach or difficult to clear, schedule a plumber to fix it. 

Also, if a downpipe empties right next to your walls, attach a temporary extension or flexible drainage hose to redirect water 2–3 metres away towards the street or another safe discharge point.

Look at your rain heads; these are the boxes where your gutters meet the downpipes, usually located at the roof edge. Even from the ground, you can often see debris like leaves, grass, or weeds accumulating inside them. Simply note which downpipe locations have visible blockages so the plumber knows exactly where to focus when clearing them. Clearing these areas ensures your gutters and downpipes can safely handle heavy rain.

Sewer Backups and Surcharge 

Townsville's sewer system is gravity-fed, meaning it relies on downward pipes to move waste.  During a cyclone, heavy rain can flood these pipes, causing sewage to back up into your home through toilets, floor wastes, or bathroom drains. 

Locate your Overflow Relief Gully (ORG), the grated drain outside near your kitchen or bathroom wall. Its job is to release sewage outside rather than into your home. Make sure it's clear of mulch, pots, or debris. If it's blocked and you cannot access it safely, arrange for an expert to clear it. 

Sump Pumps and Retention Pits

If your home is low-lying or has a basement or subfloor, you may rely on a sump pump, a device that removes water from the foundation.

Test your sump pump by pouring a bucket of water into the pit. The float switch (that rises with water) should trigger the pump automatically. If the pump doesn't start, it should be repaired or serviced. 

Also, follow the outlet pipe to the street kerb. If it's blocked by debris, leaves, or overgrown grass, the pump will struggle or burn out. Remove the blockage by hand or with a garden hose. If it is severe or difficult to reach, have a plumber fix it safely.

Most sump pumps use 240V mains power. During storms, Townsville often loses electricity, which stops the pump. If your home depends on this pump to stay dry, install a battery backup or keep a small portable generator in a dry, accessible spot.

What To Do When a Cyclone is Close

You don't have to guess when a cyclone is coming – the Bureau of Meteorology (BOM) will let you know. They issue two types of warnings:

1. Cyclone Watch: A cyclone might affect your area within the next 48 hours. This is your heads-up to start preparing.
   
   
2. Cyclone Warning: Gales are expected within 24 hours. By now, your home should already be ready.

When a watch is announced for Townsville, it's your cue to do the following: 

Secure Outdoor Areas

Any loose items in your yard become dangerous projectiles in high winds. Garden furniture, trampolines, potted plants, and loose fence sections can hit windows, puncture roofing, or damage walls. Move items indoors or under the subfloor. Large objects that cannot be moved should be securely tied to a solid anchor using ratchet straps or chains.

Garage doors are another weak point. Standard doors are large, flat surfaces with minimal support. If wind blows them in, the sudden pressure change can pop ceiling panels or damage your roof structure. 

For homes without cyclone-rated doors, a temporary vertical bracing kit – a steel post that anchors the door to both the floor and the header – strengthens the door and reduces the risk of internal pressure building up.

Protect Roof Spaces

Walk around your home and check the eaves and soffits—the flat panels underneath the roof overhang. If they are loose, damaged, or rotting, strong cyclone winds can tear them open. This allows wind to enter the roof cavity, where pressure can build up and push upward on the roof structure, increasing the risk of roof damage or sections lifting during the storm.

Secure loose sections with appropriate exterior screws and replace badly damaged panels to reduce the risk of structural damage during strong gusts.

Secure Hot Water and Gas Systems

Your hot water system is one of the heaviest and most vulnerable appliances outside your home during a cyclone.

For electric systems, turn off the switch at your main electrical board to prevent short circuits, electrical shock risks, and damage to the hot water unit if water reaches the wiring.

For gas systems, locate the yellow handle on your gas line (usually near the tank or gas bottles) and turn it to the off position before floodwater reaches it. This stops gas from flowing through the pipes, so water or debris can't create a dangerous gas buildup. 

Pre-Storm Documentation

When a cyclone watch is announced, and you still have calm weather, take five minutes to walk through the house with your phone recording:

• Ceilings, walls, floors, and wet areas
  
  
• Open cupboards under sinks
  
  
• The condition of major appliances
  
  

If damage occurs, this footage helps show your home's condition before the event and reduces disputes during insurance claims.

What To Do During a Cyclone 

During a cyclone, stay indoors and away from windows, doors, and external walls. These outer edges are more vulnerable to flying debris, broken glass, and wind pressure, which can cause sudden damage or injury.

The noise can be frightening – howling wind, rattling roof sheets, and flying debris – but stay calm and follow these few simple safety rules to protect yourself and your property.

Protect Plumbing and Water Systems

Your plumbing is under massive pressure during a cyclone, so you need to adjust how you use water:

• Limit water use. Avoid flushing toilets or using showers if you hear gurgling in the pipes. This sound means the city's sewer mains are full. Every extra litre you send down the drain increases the risk of sewage backing up into your home.
• Stay off taps and plumbing fixtures. Lightning can occasionally travel through metal pipes or wiring, so don't use taps or landline phones. Rely on your stored emergency water for drinking and hygiene until the storm passes.

Respond to Water Entering Your Home

Despite preparations, water can get in through damaged windows, failed seals, roof leaks, or gaps in doors. If this happens:

• Switch off the electricity at the main board immediately, because even small amounts of water on outlets or power points can cause a fire or a fatal shock.
• Focus on containment, not repair. Don't climb onto the roof or attempt major fixes during the storm. Place buckets under leaks. If you notice a small, isolated section of ceiling bulging, carefully poke a small hole in the centre with a broom handle to release the trapped water and reduce the risk of the entire plasterboard sheet collapsing. If the area is large or spreading quickly, move away and wait until it's safe to call a plumber for safe handling.
• Protect valuables. Move electronics, important documents, and other valuables onto benches, tables, or the top of wardrobes. 
• For raised Queensland-style homes, go to the upper level because lower areas can flood during heavy rain. Moving upstairs keeps you above potential floodwater and away from debris that may enter the lower level.

Watch for the Eye of the Cyclone

This is the most dangerous trap for residents. As the centre of the cyclone passes over the city, the wind will suddenly stop, the rain will cease, and the sky may even clear. Do not be tempted to go outside.

Always remember, the calm eye is simply the middle. Once it passes, the wind will return from the opposite direction, often with even greater force because your home's structures (like fences or gutters) were already weakened by the first half of the storm. 

Please stay in your safe area until you get the official "All Clear" from Townsville City Council.

What To Do After the Cyclone

Once the Townsville City Council gives the official "all clear", you can start checking your home. Follow this step-by-step way to protect yourself, your family, and your property.

Inspect Your Home for Immediate Hazards

Before touching taps, electricity, or moving around, look for obvious dangers:

If the soil around your pipes has eroded or shifted during the cyclone, you may see cracks, exposed pipes, or sagging areas indicating the pipes are no longer properly supported. Turning on the water in these unsupported pipes can cause them to break or snap. Contact an expert to inspect and repair the affected pipes before using your water supply to avoid further damage or flooding.

Check gas systems. Even though you turned off the gas valve pre-cyclone, if the storm was severe, damage could have shifted pipes or cylinders. Smell for any gas (a rotten egg odour) near LPG bottles or reticulated lines. If you detect gas, call a licensed gas plumber to inspect for leaks before using the system.

Check electrical hazards. If water has entered your home, floor-level power points, wiring, and hot water systems may be electrically live or compromised. Do not touch switches, appliances, or the system until a licensed electrician has confirmed the circuits are dry and safe.

Flush and Test Your Water Supply

After a cyclone, the water mains often carry silt, debris, and stagnant water, which can make water discoloured or unsafe. So, 

• Check for alerts: Look at the Townsville Disaster Dashboard. If a "boil water advisory" is in place, it means tap water may contain bacteria. Boil it for at least one minute before drinking, cooking, or brushing teeth.
  
  
• Flush your pipes: Even without an advisory, run water to remove stagnant water and sediment. Open the garden tap furthest from the water metre for five minutes. Then run all indoor taps for two minutes. This ensures clean water reaches the whole house.
  
  
• Clean tap aerators: Unscrew the mesh screens at the end of taps and rinse out silt. Put them back to restore normal flow and water pressure.

Identify Hidden Plumbing or Structural Problems

Some damage isn't obvious right away. Look for these warning signs:

If you notice slow drains or gurgling toilets, the sewer line may be blocked by silt, debris, or tree roots. Do not use taps, toilets, or washing machines until they're fixed, or sewage could back up inside your home. 

Check your Overflow Relief Gully (ORG). If sewage or wastewater is spilling out of the ORG grate, it usually means the main sewer drain is blocked. You need a plumber to inspect and clear the blockage before using water in the house, or sewage could back up inside.

In Townsville's humid climate, mould can start to grow in 24 hours. Open windows, run air conditioners in dry mode, and remove wet items. If plasterboard or carpets remain wet for more than 48 hours, they likely need to be replaced to prevent long-term health issues.

Document Everything for Insurance

Before cleaning or repairs, record all damage clearly:

• Take photos to capture watermarks on walls, debris in gutters, blocked drains, and any structural issues.
  
  
• Keep receipts and records for emergency plumbing or repairs. Keep any broken parts if possible. This proves the damage was caused by the cyclone and helps with insurance claims.

When to Book a Pre-Cyclone Plumbing Inspection

The best time to schedule a plumbing inspection is well before cyclone season starts, ideally in September or October. Booking early gives you time to identify potential weak points in your plumbing and drainage before heavy rain or strong winds arrive.

Final Thoughts

Cyclones can be frightening and unpredictable; the best approach to deal with them is to prepare ahead of time. 

Many of the pre-cyclone checks, like inspecting drains, keeping gutters clear, or knowing where your main shut-off valve is, are things you can handle yourself. But issues like damaged stormwater pipes, blocked underground drains, or weak roof plumbing aren't always easy to spot without the right tools and experience.

That's why it's often worth having a professional inspection done before cyclone season begins, ideally between September and October. Catching these problems early gives you time to fix them properly and helps avoid bigger issues during or after a storm.

At 1touch Plumbing, we carry out thorough pre-cyclone plumbing inspections to assess your drainage, roof plumbing, and water systems for potential risks. We'll identify any hidden issues, recommend the right fixes, and help make sure your home is better prepared for the season ahead.

Contact us today to book your inspection and give your home the best chance of standing strong.

FAQs

Can I drink the water immediately after the cyclone passes?

No. Do not drink tap water until authorities, such as the Townsville City Council or the Disaster Dashboard, confirm it's safe. Cyclones can cause power outages, damage treatment plants, or break pipes, which may contaminate the water supply. If a boil-water alert is issued, you must boil all water for at least 1 minute before drinking, cooking, or brushing your teeth.

Will my hot water system work if the power goes out during a cyclone?

It depends on the type of system:

• Electric storage tanks will stop heating during a blackout, but water already in the tank may remain warm for a few hours.
  
  
• Gas units with pilot lights may continue to supply hot water if the igniter isn't electrically powered.
  
  
• Electric heat pumps or gas systems with electronic ignition will not work without power.
  
  
• Solar hot water systems will not work without electricity to power the circulation pump, as with heat pump systems.

Why does my water look brown after the storm?

Brown water usually comes from sediment, dirt, or iron stirred up in your pipes during a cyclone or from pressure changes in the water system. It can also come from runoff entering private wells or from older, rusty pipes. This discolouration is temporary. 

To clear it, run an outdoor tap for a few minutes, then check your indoor taps. If the water remains brown after several minutes, avoid drinking it and follow any official boil water alert instructions.