We had some record or near record below zero temperatures in the Albuquerque area this winter. While native plants can handle the cold, this might have been too much for them. Good To Grow as several pictures of the effects of the cold on local cactus and Agaves.
I have a small prickly pair cactus in my front yard. Ever winter it “lays down” like the cactus in the pictures. Hopefully it survived.