In a weather forecast issued by the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa), five areas in Cavite and Batangas are expected to experience dangerously high heat indices despite the forecasted rains on May 19, 2026. Sangley Point in Cavite City is projected to reach 45°C, while Tanauan City in Batangas is expected to record 43°C. The local government of Calaca City has advised residents to take precautions as the heat index may also reach 44°C by noon. Meanwhile, Talisay is currently experiencing a heat index of 43°C, and Cuenca may see similar levels, with advisories indicating a potential heat index of 45°C. Pagasa categorizes heat index values between 42°C and 51°C as dangerous, warning of risks such as heat cramps, heat exhaustion, and heat stroke. The Department of Health has urged residents to stay hydrated and avoid prolonged sun exposure to mitigate heat-related health risks.