The leaves on my landscape Euonymous plants are drooping alot worse than that--as they have for the last 20 years that I've lived here. Cold winter winds and dry air do that to them. They get by, same for the lanscape azaleas next to them.
The droop on your azaleas doesn't look that bad, quit obsessing
When I started bonsai, I was convinced that my trees were in grave danger as the first frosts hit them. After work, I'd run out to Home Depot at the first news of frost was in the local forecast and buy plastic sheeting, mulch, insulation, etc. -speed home and frantically get everything under cover before the sun set and the dreaded cold sunk in...
After about five years of that hysteria, I was too tired to really care one winter. I just let my trees sit out -- until the middle of Dec. They froze solid for weeks. I thought I'd lost everything, but put them in storage anyway. The next spring, they looked healthier than they had in a very long time.
I had been coddling them and preventing them from entering dormancy properly. Winter dormancy cna be enhanced a bit by shallow freezes. It can "harden" the plants to deeper winter chills. Frost and freezing isn't necessarily all that bad.
The most dangerous time will come in the spring. As soil warms (and it warms quickly and steeply in a pot that's exposed to air temperatures) it stimulates plants to grow. That's terrific, BUT, once plants, especially deciduous and broadleaved evergreens begin growing, they LOSE about 95 percent of their ability to withstand freezing and frost. A short late freeze that they may have breezed through in Feb. could kill them in March. So, if you want to worry about something, worry about the coming spring and how your going to keep your trees from premature growth.