The Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) has issued a warning regarding dangerously high heat indices expected on Thursday, May 28, 2026, across 53 areas in the Philippines. The highest forecasted temperature is 47°C in Sangley Point, Cavite. In Metro Manila, Quezon City is anticipated to experience a heat index of 42°C, while Pasay City could reach 44°C. Pagasa weather specialist Loriedin dela Cruz-Galicia emphasized that these temperatures fall within the danger level range of 42-51°C, indicating significant risks of heat stress, heat cramps, and heat strokes. The heat index, which combines humidity and temperature to reflect how hot it feels, is critical for public health. Other regions facing extreme heat include Tuguegarao City and San Ildefonso, both expected to reach 46°C, and several areas with indices around 45°C and 44°C. The public is advised to take precautions against heat-related illnesses during this extreme weather event.