Food Safety After a Flood in a Kitchen

After a flood, fire or contaminated water event, food safety starts with a simple rule: when in doubt, throw it out. In a commercial kitchen, discard any food touched by floodwater, smoke, firefighting chemicals or unsafe water, discard food that was left without refrigeration, sanitise all surfaces and equipment, and confirm your water supply is safe before you cook or clean with it again. Standard 3.2.2 of the Food Standards Code requires food to be protected from contamination, and an emergency is exactly when that protection is most at risk. These events are chaotic, and it is easy to focus on the building while overlooking the food. Yet contaminated stock, unsafe water and dirty surfaces are what put customers at risk once you reopen. This guide walks through each area so you can recover safely and show your local council you did the right thing. What food must you throw away after a flood or fire? Floodwater and firefighting activity carry sewage, chemicals, silt and bacteria, and none of these can be washed off food. Any food that has come into contact with them must go. Fire also damages food through heat and smoke long before flames reach it, and the chemicals used to fight a fire can seep through packaging. Do not try to salvage borderline items to save money. The cost of replacing stock is far smaller than the cost of a foodborne illness outbreak traced back to your kitchen. Discard these items Any food, packaged or unpackaged, touched by floodwater, smoke or firefighting chemicals. Food in packaging that is not fully sealed and waterproof — cardboard, paper, cloth, screw-top jars and containers with peel-off lids. Fresh produce, meat, dairy and other potentially hazardous food that lost refrigeration in the event. Any food you are unsure about — do not taste it to check. What can sometimes be kept? Undamaged commercially canned food may be salvageable if you remove the labels, wash the cans, then sanitise them and re-label them, provided the cans are not bulging, dented on a seam, rusted or leaking. Even then, apply careful judgement. Food in the freezer that still holds ice crystals and stayed below 5C may be usable, but anything that warmed into the temperature danger zone between 5C and 60C for too long must be discarded. How do you clean and sanitise surfaces and equipment? Everything that food touches, or that hands touch before touching food, needs cleaning and sanitising. Floodwater leaves behind bacteria and residue that ordinary wiping will not remove, so a two-step approach is essential: clean first to remove visible dirt and grease, then sanitise to reduce bacteria to safe levels. Pay special attention to food-contact surfaces such as benches, chopping boards, slicers and utensils. Porous items that soaked up contaminated water, including wooden boards, some plastics and damaged equipment, are often impossible to sanitise fully and should be replaced. A structured cleaning and sanitising schedule helps make sure nothing is missed during the rush to reopen. Item Action Stainless benches and equipment Clean, then sanitise; check no water pooled inside machinery Chopping boards and utensils Sanitise if non-porous; replace porous or damaged items Fridges and coolrooms Clean, sanitise, confirm they hold at or below 5C before restocking Soft or porous items Discard if they contacted floodwater or smoke Is your water supply safe to use again? Water is central to a commercial kitchen — you drink it, cook with it, wash food, and clean equipment with it. After a flood or a mains contamination event, do not assume the supply is safe. If a boil-water alert is in force, or if your supply may be affected, treat the water as unsafe until the authority confirms otherwise. While water is under a boil notice, only use boiled and cooled water or bottled water for drinking, food preparation, making ice, and washing produce and hands. Ice made from unsafe water must be discarded and the machine cleaned. Your state or territory health department and water authority will advise when the supply is safe. Food Standards Australia New Zealand sets out practical steps in its food safety in an emergency guidance . What about refrigeration loss and pest risk? Floods, fires and storms often cut power, and lost refrigeration is one of the biggest hidden risks. Check the core temperature of stored food with a probe thermometer, and apply the 2-hour/4-hour rule for potentially hazardous food that has been in the danger zone. Before you restock a fridge or coolroom, clean and sanitise it and confirm it holds at or below 5C. Reliable temperature monitoring makes it far easier to prove which items stayed cold and which did not. Emergencies also draw pests. Floodwater displaces rodents and insects, standing water and debris attract them, and damaged buildings offer new entry points. Inspect for droppings, gnaw marks and nests, seal gaps, remove debris and standing water quickly, and store any salvaged food in sealed, pest-proof containers off the floor. Do not overlook drains, seals and hidden moisture Water finds its way into places you cannot see. After a flood, check floor drains, the seals around coolroom doors, the cavities beneath and behind equipment, and any insulation that may have soaked up contaminated water. Trapped moisture breeds mould and bacteria for weeks and creates lingering odours that signal a deeper problem. If insulation or sealed panels have absorbed floodwater, they usually need to be replaced rather than dried, because you cannot sanitise what you cannot reach. How do you get staff and premises ready to reopen? Reopening safely is a decision, not just a clean-up. Before you serve customers again, walk the kitchen against a simple checklist: food that had to be discarded has gone, surfaces and equipment have been cleaned and sanitised, refrigeration holds at or below 5C, the water supply is confirmed safe, and pests have been ruled out. Brief your team on what changed during the incident so nobody unknowingly uses stock or water that should not be used. A short handover at the start of the first shift back prevents mistakes born of assumptions. When should you contact the regulator? Contact your local council's environmental health team before reopening if your premises suffered significant flood or fire damage, if your water supply was compromised, or if you are unsure whether it is safe to trade. An EHO can advise on what must be discarded, what cleaning is required, and whether an inspection is needed before you serve customers again. State health departments such as Queensland Health publish emergency food safety advice that is worth reading alongside council guidance. Frequently asked questions Can I keep canned food that was in a flood? Only undamaged commercial cans may be salvageable. Discard any can that is bulging, leaking, rusted or dented on a seam. For cans you keep, remove the label, wash and sanitise the outside, then re-label so you know what is inside. Is food in the freezer safe after a power cut? Food that still contains ice crystals and stayed at or below 5C is generally safe to use or refreeze. Food that thawed and sat in the danger zone between 5C and 60C for more than four hours should be discarded. How do I know when tap water is safe again? Follow your water authority and state health department. Until they lift a boil-water alert, use boiled and cooled or bottled water for drinking, food preparation, ice and washing, and discard ice made during the alert. Do I need to tell the council before reopening after a flood? If damage was significant or your water was affected, contact your local council's environmental health team before trading. They can confirm what needs to be discarded or cleaned and whether an inspection is required. Recovering from a flood or fire is hard enough without losing track of what you discarded, cleaned and checked. FoodSafety HQ keeps your incident records, temperature checks and cleaning logs in one place, so you can reopen safely and show your council exactly what you did. Explore our incident and corrective action management tools, or start a free trial from our pricing page .