The Philippine Institute of Volcanology and Seismology (Phivolcs) on Wednesday, Dec. 18, issued a warning of potential lahars and sediment-laden streamflows, which may occur along the Tamburong Creek in Brgy. Biak Na Bato, Baji Baji Falls, and Talaptaan Creek in Brgy. Cabacungan, all in La Castellana, Negros Occidental.