ZZ Plant overwatered by accident

[Klona]

So I went on a trip for a week and while I was gone, mum watered the plant every few days. When I was back I noticed the biggest stem had leaves that were a bit yellow. I thought it was gonna heal itself but I was wrong. I think it's getting worse. I attached some photos of the yellow leaves and the healthy ones for comparison. What can I do to limit the damage?

 

[Chuck]

It may loose a few leaves but what happens when it rains for days on end? It finally stops raining and it dries out and everything is fine. Same thing here. Just dry it out and give it time.

 

[Klona]

It may loose a few leaves but what happens when it rains for days on end? It finally stops raining and it dries out and everything is fine. Same thing here. Just dry it out and give it time.

It is indoors Chuck.
Anyways, it is completely dry now. I hope it doesn't die out.

 

[Belmont]

Theres a pretty good chance the yellow leaves will fall off but the plant will survive.

 

[Verdun]

Klona, it will be fine. Let it dry out a little then return to your usual regime with it.
Plants do suffer extreme weather at times anyway but usually recover

 

[Klona]

The stem looked dried up so I watered and also misted it. It also looks like there's a new shoot coming up!