Sewer backups and flood water are biohazard contaminants which can be very dangerous and can affect your homes and businesses. The biohazard can pose health risks; it is important to call certified professionals, like SERVPRO employees to take care of the sewage with their high quality products to achieve efficient results. Stay out of the affected areas after the contamination has taken place. If the situation is extreme or life threatening call emergency services and turn off the HVAC system. Try to not leave affected wet fabrics on the floor and hang them instead. Dispose of all book, magazine, or any other objects which may leave color residue on the carpets or floors. Biohazards like flood water or sewer backups need to be considered as an emergency because if you wait it can lead to extreme hazards.