Fishermen in Batangas province, Philippines, are struggling with massive number of dead fish allegedly killed by climate change over the weekend.

Since Friday, over 750 tonnes of fish had died in Taal Lake near Manila, affecting the towns which depend economically on fishing industry to lose disastrously. The fish died from oxygen depletion, according to the Bureau of Fisheries and Aquatic Resources.

Scientists said because of the rainy season, water temperatures drop sharply, which depleted oxygen levels in the lake. Vast majority of dead fish are milk fish and tilapia, which are commercially bred in cages along the lake's shores.

There are just so many dead fish, Zenaida Mendoza, mayor of Talisay said. Fishermen are hauling them manually using their boats, and bringing them ashore. But the rotting smell is overpowering and could pose a health risk.

Talisay is one of the most affected towns . Now Mendoza is turning to the national government for help to deal with the dead fish.