The heat index or human-perceived temperature in Metro Manila on Friday could hit 34.3 to 38.2 degrees Celsius, according to the forecast of the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa).
At the PAGASA Science Garden station in Quezon City, the heat index forecast is between 34.3 to 38.2 degrees Celsius, weather specialist Raymond Ordinario reported.
A high heat index could also be felt in the Dagupan station (39 degrees), Laoag (39.1 degrees) and Sangley (39.6 degrees).
Heat index, as explained by the state weather bureau, is a human discomfort index that gives the “apparent” temperature, or what humans perceive or feel as the temperature affecting their body.
PAGASA advised the public to stay indoors as much as possible, wear light-colored clothing and stay hydrated.
A heat index ranging from 32 to 41 degrees Celsius falls under “extreme caution” due to possible heat cramps and heat exhaustion while continuing activity could result in heatstroke.