Samoa's Water Authority is warning it could cut water supply to consumers if people continue to waste water on unnecessary tasks like watering gardens and cleaning vehicles.Most parts of Upolu and Savaii have been experiencing a drought for about a month.The water authority says the country is facing water supply problems as a result of the drought, caused by the El Nino weather pattern.Two years ago the Water Authority rationed water supply because of the same El Nino weather conditions.