Celebrated even when the Castro was predominantly an Irish Catholic family neighborhood , as the demographics transformed , Halloween in the Castro became a major city event , described by author David Skal as " gay high holy day " , attracting thousands of outsiders . On October 31 , 1989 , two weeks after San Francisco was devastated by the 6.9 MW Loma Prieta earthquake , the Sisters used donation buckets to collect thousands of dollars for the mayor 's Earthquake Relief Fund from the Halloween crowds that poured into the Castro neighborhood for the massive street party
Loma Prieta earthquake
1989 Loma Prieta earthquake
Sisters of Perpetual Indulgence