21 areas to experience danger-level heat indices on May 1

At least 21 areas across the country are expected to experience danger-level heat indices on May 1, 2025, according to PAGASA.

Cavite City and Tanauan, Batangas are forecast to record the highest heat index at 45 degrees Celsius.

Pasay City may reach up to 44 degrees Celsius, while northern Metro Manila is expected to have a heat index of 39 degrees Celsius.

The apparent temperature or the "feels-like" heat experienced by the human body may reach between 42 and 47 degrees Celsius across several parts of Luzon and the Bicol Region.

A heat index within the danger category increases the risk of heat cramps, heat exhaustion, and heat stroke with prolonged exposure or physical activity under the sun.

Other areas with high heat indices include Palawan, Mindoro, Camarines Sur, Masbate, Cagayan, Isabela, La Union, and Pangasinan.

PAGASA advises the public to stay hydrated, use sun protection like umbrellas, and wear loose, cool clothing when outdoors.