On September 19, 1985, at 7:14 a.m. an earthquake reaching a magnitude of 8.1 on the Richter scale and lasting almost two full minutes hit the coast of Mexico, rocking its capital city and shaking its buildings and its people. The next day, at 7:38 p.m., Mexico City experienced a second tremor of an almost equal magnitude on the Richter scale, 7.5. What has come to be known as the Mexico City earthquake, then, was in actuality two earthquakes, although those who experienced it lived through a single disaster whose longer-term reverberations were as powerful as the first set of tremors that hit the city on that initial day in September. The earthquake, or those two days of tremors big and small, produced a physical disaster on a scale not seen since the destruction of the city in 1521, when Hernán Cortés’s forces defeated the ancient Aztec city of Tenochtitlan. This same battle site later served as the seat of eighteenth- and nineteenth-century Spanish colonial power and subsequently marked the place where the majority of the 1985 earthquake damage occurred. After the first day alone, 250 buildings were completely destroyed with 50 more at risk of collapsing; thousands of others were damaged or considered to be unusable. Five thousand people were injured with more than 1,000 still trapped under the debris; more than 250,000 people were homeless. The city lacked telephone and electricity services. After the second day’s quake, when more reliable statistics began flowing in, 2,000 were officially confirmed dead (although close to 7,000 cadavers had been identified) with 28,000 still listed as missing; more than 7,000 victims were being treated at relief stations, with 30,000 at gyms and other sites turned into shelters. More than 800,000 residents were ultimately forced to abandon their homes and sleep in the open air. Official statements later acknowledged 5,000 killed and 14,000 injured; but an independent final tally accounted for 2 million residents temporarily made homeless and thousands dead, tens of thousands injured, 100,000 damaged building units (mostly residential), and hundreds of thousands of residents made permanently homeless.