ATHENS, Aug. 27 (Xinhua) -- A state of emergency has been declared on the Greek island of Hydra due to electricity and water outages which started on Sunday morning, Greek national news agency AMNA reported on Monday.

The Hellenic Electricity Distribution Network Operator (DEDDIE) has not yet found the cause of the blackout and announced that two generators that will temporarily supply the island have been loaded onto a ship that would arrive in Hydra on Monday.

Meanwhile, the water supply problem is being solved with the help of a Greek Navy tanker that brought water to the island on Monday, as water pumps on the island rely on electricity.

Local hoteliers reported that disappointed tourists had left the island as a result of the outages.

Last week many districts of Athens were hit by an electricity blackout for at least two hours, resulting in traffic jams due to traffic lights which were not operating and at least 90 telephone calls to the Fire Service for people stranded in elevators.

According to the Greek power grid operator ADMIE, that blackout was due to a faulty switch at a sub-station in a northern Athens suburb.