Well, this morning proved me wrong about there being no more freezes in store for my part of Phoenix - it got down to 31 degrees here. It was clear and dry, so easy to radiate the heat away. It might be colder tonight. There was a lot of dust in the air last night left over from the arrival of the cold front with its high winds. If that moves out, it will be easier for heat to radiate, but counteracting that is the effect of a full day of solar heating.
Have to wait and see if it did any damage to the citrus, with its tender new leaves and flower buds exposed. If it is all OK, in a few weeks, the air will be rich with the fragrance of citrus blooming. How long the fragrance lasts will depend on how quickly it gets hot. That transition used to take a month or so, but lately it seems to happen from one week to the next. Lower seventies to higher eighties and low nineties in a few days. Maybe that is just faulty memory.