MANILA (UPDATED) - Potential storms surges that can be caused by tropical storm Basyang (international name Kajiki) might affect almost a million people in the Visayas and Mindanao, the Global Disaster Alert and Coordination System (GDACS) warned on Friday.
GDACS, a project of the United Nations, the European Commission, and disaster managers worldwide, said low-lying coastal areas in central, western, and eastern Visayas, as well as northern Mindanao on the path of the cyclone are most vulnerable.
GDACS, which also issued storm surge warnings ahead of super typhoon Yolanda's landfall in November, has yet to estimate the height of the potential storm surges that Basyang might generate.
It also warned that the tropical storm, which made landfall over Siargao island early Friday night, could affect up to 11.5 million people.
GDACS said the following areas with large populations will be affected by Basyang:
It has also raised an orange alert for rain being carried by Basyang. GDACs said the cyclone is bringing as up to 25mm per hour rainfall, with medium likelihood for flash floods.
State weather bureau PAGASA on Friday issued a similar warning on storm surges that can be generated by Basyang.
It said people living in coastal areas under storm signal number 2 should be on alert against storm surges.
Public storm warning signal number 2 has been hoisted over the following areas:
Calamian group of islands
Surigao del Norte
Northern part of Surigao del Sur
Northern part of Agusan del Norte
HEAVY RAINFALL, FLOODS
PAGASA said moderate to heavy rains were affecting parts of Agusan del Norte, Agusan del Sur, Surigao del Norte, Siargao, Dinagat, Surigao del Sur, and Camiguin as of 6 pm.
PAGASA, at around 5 p.m. Friday, issued a yellow rainfall alert on the southern part of Eastern Samar and Western Samar, Leyte, Southern Leyte, and Biliran Island.
"Flooding is threatening in in low-lying areas and landslides in mountainous areas," the weather bureau said.