I'm in USDA zone 9a. In February 2018, we had very cold temperature. In my garden, about -9°C. Sapote Blanco ( Casimiroa edulis) survived, the young and tender leaves drop, but the trees recover well during the summer.
Tamarillo (Solanum betaceum) all aerial parts were damaged, but also recover well. Some avocado tree dies, but not all ! Citrus were fine.