He migrated to New York in 1921. During the Spanish Civil War, he was the main representative of the Frente Popular Antifascista Gallego, along with Víctor Fernández. After the end of the war and the disintegration of the society, Emilio Flores was one of the founders of a new Galician society, inspired by Castelao. This society was the Casa Galicia Unity Gallega, of which he was also president in 1944-1947,1951-1952,1959-1960,1965-1972 and 1974-1976.
As president of Casa Galicia he not only worked for the stability and economic growth of society and the acquisition of various buildings, but also organized many activities in both New York and Galicia, for example raising funds for Real Academia da Lingua Galega, a Cociña Económica da Coruña and the Sanatorio de Oza (Sources: Emilio González López, “Emilio Flórez y la Casa de Galicia de Nueva York”; Amado Rincón “Requiem por un baril loitador da cultura galega en Nova Iorque”, in the Memoria of Casa Galicia 1981-1983).