THIRUVANANTHAPURAM: The National Centre for Polar and Ocean Research has issued a warning that there is a possibility of high waves and storm surge in the state till tonight. Waves can be 1.4 to 2 meters high. Fishermen and coastal residents should be cautious. Trips to the beach and activities in the sea should be completely avoided. There is also a warning that fishing vessels and equipment should be kept safely tied up in the harbor.