The weather bureau has raised public storm warning signals on Monday over several provinces in Northern Luzon as tropical storm Helen (international name Kai-tak) is expected to continue to bring heavy to torrential rains and strong winds over the area.
"Tropical storm Helen has maintained its strength and continues to threaten Northern Luzon," the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) said in its 5 p.m. update.
Public storm warning signal number one has been raised in the provinces of Isabela, Quirino, Aurora, Kalinga, Apayao, Cagayan, including the Babuyan, Calayan and Batanes group of islands.
Winds in the areas are expected at 30 to 60 kilometers per hour (kph) within the next 36 hours, Pagasa said.