People may use natural gas appliances during an electrical power outage, but only with extreme caution. Do not try to operate natural gas appliances when there is a gas cut. During electrical power outages, natural gas usually continues to flow through gas pipes. In an emergency, stoves and natural gas ranges may be used for cooking. Barbecues can be used for cooking food, but only ever outdoors. Natural gas ranges should never be used for space heating—they are designed for occasional uses like cooking. Burning natural gas releases carbon monoxide and carbon dioxide, among other pollutants. Leaving a natural gas range to burn for long periods increases the chances of severe health problems.