Manila, May 7 -- Thirty-seven areas are forecast to experience danger level heat indices on Tuesday, with the highest at 45 degrees likely in Dagupan City, Pangasinan.

A heat index of 45C is forecast in Clark, Pampanga; Cuyo, Palawan; and Virac, Catanduanes.

Heat index or what the temperature feels like to the human body when relative humidity is combined with the air, ranging from 42 to 44 degrees are likely in the following areas:

Bacnotan, La Union - 44C Aparri, Cagayan - 44C Tuguegarao City, Cagayan - 44C Baler, Aurora - 44C Casiguran, Aurora - 44C San Jose, Occidental Mindoro - 44C Puerto Princesa City, Palawan - 44C Roxas City, Capiz - 44C Iloilo City, Iloilo - 44C Catarman, Northern Samar - 44C NAIA - 43C Iba, Zambales - 43C Abo...