I just replied on CNQ but will post here for reference of anyone else who may need it in the future:
I'd try to find a vet that's open for emergencies tonight if you can. If none are available, I'd do a warm compress on the eyes to help relieve that irritation. Keep them warm and if they seem to have upper respiratory issues, you can run a hot shower and get the bathroom all steamy, then take them in the bathroom for a few minutes at a time to help break up the congestion.
Some Nutri-Cal might help with energy and calorie requirements in the meantime if you have any also.
But again, I'd try to reach a vet tonight. With as fast as they're deteriorating I'd bet they need to be hospitalized.