How to Prepare for a Cyclone: A Townsville Plumber’s Essential 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 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: 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








