A rare occasion of strong waves with a height up to 3.5 metres hit the west coast of Penang and Kedah since 1pm today.
In Penang, not less than 11 houses in Kampung Tsunami Tanjung Bungah, here were reported inundated with sea water.
Due to this, he said the villagers had now started to build sand fortresses around their houses as preparation to avoid worse incidents.
In Padang Kota Lama and Persiaran Gurney here, Bernama checks also found he sea water had spilled on to the two main roads.
The same happened in Batu Ferringhi and Teluk Bahang , two famous tourist spots here which appeared vacant although businesses were still operating.
Meanwhile in Kedah, Bernama checks found most of the fishermen in Kuala Kedah were unable to go to sea the last two days because of the phenomenon.
The director of the Forecast Centre of the Meteorology Department, Muhammad Helmi Abdullah, said the incident was a normal naturl phenomenon and was due to the shift from northeast monsoon winds to southwest monsoon winds, which began on May 4.
He said the phenomenon involving wind speed up to 50 knots was expected to last until this Friday.