A series of major disasters occurred in the state from the 1920s to the 1940s . In 1928 , a series of earthquakes destroyed many of the buildings in the capital . A much larger earthquake in 1931 , was the largest in the state 's history , devastating a number of cities along the coast . The 1930s brought the Great Depression , which along with the disasters , prompted wide scale migration to Mexico City . In 1944 , torrential rains caused massive flooding in the Tuxtepec region , causing hundreds of deaths
much larger earthquake in 1931
1931 Oaxaca earthquake
Oaxaca