Marambio, that was the information I was looking for, thank you very much. I would not want to drive into a disaster area for holidays, for obvious reasons.
Last but not least, for some awkward reason Google Maps has been showing for years that RN7 (Buenos Aires - Mendoza) is closed near Vicuņa Mackenna. That road was indeed closed - 10 years ago!
Ha, I've noticed that too! But if you look at the satellite version in greatest detail, you can see the cars driving through. Really weird.