Based on the PAGASA's latest heat index forecast, Daet, Camarines Norte, has the highest possible heat index of 46°C, followed by a heat index of 44°C in Cotabato City, Maguindanao.
Meanwhile, a heat index of 43°C may be felt in Aparri, Cagayan, while a heat index of 42°C may be experienced in Tuguegarao City, Cagayan; San Jose, Occidental Mindoro; Puerto Princesa City, Palawan; Aborlan, Palawan; Roxas City, Capiz; and Central Bicol State University of Agriculture station in Pili, Camarines Sur. PAGASA said heat indices of 42 to 51°C is considered “dangerous,” which may lead to heat stroke when activity is continued, as heat cramps and heat exhaustion are also possible.