Koi out of pond

I have a 10" Koi who was out of the pond when I got home tonight. Not
completely dry but not breathing. Got him back in water and moved him
by hand to get some water flowing through gills. He started breathing
but still very weak. He's on side and having difficulty moving at all.
tends to drift down but is breathing. Water temp is about 40 degrees.
Pond has a pump filter and I put him in the flow from the pump where
it re-enters the water.
Am I stressing him too much by moving him around?
Should I move him to warmer water?
If so, should it be done immediately and how fast do I raise the
temperature?
Will it stress him or subject him diseases?