Lopez was born in the state of Puebla in the Mixteca region of Mexico, a mountainous territory whose namesake is derived from the Nahuatl word for "between the clouds." He dreamed of becoming a doctor, but when money put that dream out of reach, he followed an ill-fated romance to New York. Over the next six years, he fell in love again, welcomed the eldest of his five children and kept the lights on by selling hot dogs and hamburgers from a kiosk in Central Park.