Carbon monoxide (CO) is produced when a fuel such as charcoal, gas or petrol burns incompletely.
This could be because an appliance isn’t working properly or might simply happen as part of its normal function. Barbecues, for example, produce carbon monoxide even when they are working well.
Carbon monoxide is a colourless, odourless gas and is poisonous. In high concentrations it can kill swiftly. In smaller concentrations CO poisoning can give symptoms similar to flu or food poisoning. Look out for headaches, nausea and vomiting, dizziness, drowsiness and weakness - but the best advice is to avoid any chance of being poisoned in the first place.
Be careful when burning any type of fuels in an emergency.
Having a battery operated CO detector can be a life saver.