On June 14, the Philippine Atmospheric, Geophysical and Astronomical Services Administration raised storm warnings in advance of Typhoon Yunya for much of Luzon and areas south of Manila. With Mount Pinatubo having already erupted once by this time, there were fears that the storm's heavy rains, combined with ash from the volcano, would create massive lahars capable of burying towns away from Pinatubo. As a result, 60,000 individuals were evacuated. Landslides on June 14 destroyed bridges in Santa Fe and homes in nearby Castillejos were washed away. By June 15, air-borne ash combined with the typhoon's rainfall, resulting in widespread travel disruptions and structural collapses. The mixture also made it appear as through it was nighttime during the middle of the day, prompting concern from residents. The wind from the typhoon carried ash within from Pinatubo, including to Manila, which prompted most of the airports in the country to close and Philippine Airlines to cancel all domestic and international flights through June 19. Low to mid-level winds and heavy rains from the storm contributed to widespread tephra falling over an area of of central and western Luzon. Heavy rains also resulted in lahars along mountains between the Gumain River to the Sacobia River and between Sacobia River to the O'Donnell River. These lahars inundated crops and homes, especially along the Abacan River. As a result of the lahars, some buildings and all bridges in Angeles were destroyed. Moreover, 320 people were killed and 279 others were injured. The United States Geological Survey believes that the death toll from the lahars would have been far lower if not for Yunya.