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Lake Pinatubo (Filipino: Lawa ng Pinatubo) is the summit crater lake of Mount Pinatubo formed after its climactic eruption on June 15, 1991. The lake is located in the Zambales Mountains, in Botolan, Zambales, near the boundaries of Pampanga and Tarlac provinces in the Philippines. It is about 90 km (56 mi) northwest of the capital city of Manila.
The 1991 caldera afterwards filled with water from annual monsoon rains and a crater lake, Lake Pinatubo, was formed. In 1992, a growing lava dome formed an island, which was eventually submerged by the lake. Initially, the lake was hot and highly acidic, with a minimum pH of 2 and a temperature of about 40 °C (104 °F). Subsequent rainfall ...
Mapanuepe lake is located at the confluence of Marella and Mapanuepe Rivers as the two rivers merge to become the Santo Tomas River. The subsequent rains following the 1991 eruption of Mount Pinatubo produced lahar that dumped volcanic debris on the Marella River, one of the major drainages of the mountain, aggrading the river that eventually dammed the Mapanuepe River.
With an average depth of 800 m (2,600 ft), Lake Pinatubo is the deepest lake in the Philippines. The highest point of the caldera rim is 1,485 m (4,872 ft) above sea level, some 260 m (850 ft) lower than the pre-eruption summit.
The water level is now around 13 inches (33 cm) above its record low recorded in 1943. The double whammy of extreme dryness and heat has led to higher-than-normal water evaporation, said Quispe.
Emergency officials warned in a 6 p.m. ET Facebook post that Lake Lure Dam water levels are now receding. Emergency personnel have rescued more than 25 people through "swift water rescue."
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On May 7, the lake was at 114% of its historical average level. The so-called bathtub ring that clearly outlined the lake in 2022 — so stark it was visible from space — had disappeared by 2024.