Basements when flooded can containt raw sewage which is hazardous.
Basements that have been flooded with sewage or other contaminating material are hazardous to health and safety. Do not handle any connected electrical cords or appliances until all power has been shut off. Call the electric utlitiy service department for assistance before attempting to disconnect cords or open fuse or circuit breaker box in a flooded basement. While your basement is still flooded, avoid flushing toulets or using other water connected appliances or fixtures whose discharge would invrease the hazard or make your basement difficult to clean. After cleaning the basement, make sure that all clothing and parts of the body in contact with sewage are thoroughly washed.