Philippines: Adverse weather forecast across Davao and Caraga regions through at least Dec. 19

Severe weather is forecast across much of Davao and Caraga regions through at least Dec. 19. A low-pressure area is forecast to bring heavy rainfall and thunderstorms across the affected area over the coming days. Heavy downpours may trigger flooding in low-lying areas and landslides on unstable slopes. As of Dec. 16, the Philippine Atmospheric, Geophysical, and Astronomical Administration (PAGASA) has issued a weather advisory for heavy rainfall over parts of the region, with rainfall totals of 5-10 cm (2-4 inches) forecast across Dinagat Islands and Surigao del Norte provinces Dec. 16-19 and Surigao del Sur and Davao Oriental provinces Dec. 16-18. Severe general flood advisories (the second lowest level on a four-tier scale) are in place across the Caraga Region and Davao Del Norte, Davao Del Oro, and Davao Oriental provinces in the Davao Region. Officials could update and extend the coverage of weather alerts over the coming days.

Sustained heavy rainfall could trigger flooding in low-lying communities near rivers, streams, and creeks. Urban flooding is also possible in developed areas with easily overwhelmed stormwater drainage systems. Sites downstream from large reservoirs or rivers may be subject to flash flooding after relatively short periods of intense rainfall. Landslides are possible in hilly or mountainous areas, especially where heavy rain has saturated the soil.

Authorities could issue mandatory evacuation orders for flood-prone communities over the coming days. Disruptions to electricity and telecommunications services are possible where significant flooding or landslides impact utility networks.

Floodwaters and debris flows may render some bridges, rail networks, or roadways impassable, impacting overland travel in and around affected areas. Ponding on road surfaces could cause hazardous driving conditions on regional highways. Authorities could temporarily close some low-lying routes that become inundated by floodwaters. Severe weather could also trigger flight delays and cancellations at regional airports. Flooding could block regional rail lines; freight and passenger train delays and cancellations are likely in areas with heavy rainfall and potential track inundation.

Localized business disruptions may occur in low-lying areas; some businesses might not operate at full capacity because of flood damage to facilities, possible evacuations, and some employees' inability to reach work sites.