Her husband passed away in 1990. Following his death, she moved in with her granddaughter in Imperial Valley, California. At the age of 100, in 2006, she became an US citizen.
At the age of 110, she was still able to stand and walk. At the time, she had 36 grandchildren, and many great-grandchildren and great-great-grandchildren. [source] At the time, she was still living in Imperial Valley near the Mexican border, however, she moved to Mexico sometime after the birthday.
López passed away in Mexicali, Baja California, Mexico, on 14 September 2017, at the age of 110.