central iowa, 1.5 acre pond, 12' at the deepest, avg 7.5 when full

i am in a drought, pond is down 2'

i aerate via windmill year round, deep in summer shallow in winter, always have an open hole all winter

my question and fear is that the drought will break and put two foot of unoxygenated rain runoff in my pond right before winter without enough sun to really hold a good algae bloom, the water is clarifying quickly here, pre winter as the water is cooling off

is there any precautions i can take a head of time, or be ready to take in case of a influx of rain water?