Heavy rain and floods are affecting dozens of villages, after Typhoon Koppu swept through the northern Philippines.
The slow-moving weather system has killed at least two people and forced tens of thousands from their homes.
Troops have been deployed to help residents trapped on rooftops, but are struggling to access more remote areas.
Koppu has now been downgraded to a severe tropical storm by the Japanese Meteorological Agency, which is responsible for naming and tracking it.
However, the Philippines' own weather agency, which calls the weather system Lando, is still characterising it as a typhoon.
Unlike previous tropical cyclones, the threat from typhoon Koppu is not so much from the wind but from the massive amount of rain.
More than a metre of rainfall is forecast in just a few days in Luzon province. That is double what London gets in an entire year.
In the south of Luzon, it has brought severe flooding with whole villages under water. But perhaps more dangerous are massive landslides. The fear is that with the ground heavy and saturated with water, whole hillsides could collapse.
We visited one small community near Burgos where 70 families are now living in a makeshift evacuation centre because of the fear the hills on which they live could collapse.
Typhoon Koppu made landfall near the town of Casiguran on the main island of Luzon on Sunday morning, bringing winds of close to 200km/h (124mph) and cutting power to vast areas.
A teenager was killed by a fallen tree in Manila which also injured four others. A concrete wall also collapsed in the town of Subic, northwest of Manila, killing a 62-year-old woman.