We ended up hitting 14F with wind blowing at 10+ mph here in western Louisiana last week, I had all my citrus covered with C7 Christmas lights or 250 watt heat lamps under the covers (tarps, sheets, blankets, whatever I could find) on each, which only helped so much. I am still waiting to see the overall damage, 30-50% leaf drop on most of the trees so far, though with lots of curling dried out leaves still hanging on the trees. While surveying the damage today I found one of my smaller (3 ft tall) 2nd year in ground Satsumas currently has a total of 4 leaves growing on a limb just above the graft line that look healthy, all other leaves on the tree a showing significant curling, drying, etc. My meyers and Cara Cara seem to have fared better though the Cara Cara, now about 7 ft tall is showing lots of curling leaves.