MANILA, Philippines — Signal No. 1 has been raised over parts of Northern Luzon as Severe Tropical Storm 'Marce' has slightly intensified and nearing typhoon category, the state-run weather agency said on Tuesday.

Affected areas include Batanes, Cagayan including Babuyan Islands, the northern and eastern portions of Isabela (Maconacon, San Pablo, Palanan, Dinapigue, Santa Maria, Cabagan, Tumauini, Santo Tomas, Ilagan City, Divilacan and San Mariano), the northern portion of Apayao (Santa Marcela, Luna, Calanasan, Flora and Pudtol), and the northern portion of Ilocos Norte (Pagudpud, Dumalneg, Adams, Bangui, Burgos, Pasuquin and Vintar).