The 1990 Luzon earthquake ( = 7.7) destroyed some parts of Baguio and the surrounding province of Benguet on the afternoon of July 16, 1990. A significant number of buildings and infrastructure were damaged, including the Hyatt Terraces Plaza, Nevada Hotel, Baguio Park Hotel, FRB Hotel and Baguio Hilltop Hotel; major highways were temporarily blocked due to landslides and pavement breakup; and a number of houses were leveled or severely shaken with numerous casualties. Some of the fallen buildings were built on or near fault lines; local architects later admitted structural building codes should have been followed more religiously, particularly regarding concrete and rebar standards, and "soft stories." Baguio has been rebuilt with aid from the national government and international donors such as Japan, Singapore and other countries, including the continuous American aid to National government, which for 1990–1991 direct aid totaled over US$480 million.