Sorry, cannot see your pictures. Get unexpected error message. In any case all you can do (in my opinion) when these little disasters happen is just fix up the conditions and hope that improved conditions will enable your orchids to recover.

Seems like a lot of decline in just one week, with green leaves starting to wrinkle up. Could it be someone decided to fertilize them for you? If that's it, they might be gonners.

You know your own plant best, so you know if this is "reasonable" senescence or not. If it is too much change, I would take some action. If they are in plastic pots with drenched sphag, I would at least ease them out of the plastic pots and set them into a slightly bigger clay pot so the sphag could dry out faster.

I also sometimes would give a too-wet plant a drink of about 50-50 peroxide (drugstore or grocery store type) and water. Or even full strength peroxide. The peroxide is H2O2, and the second O is unstable and easily detaches. So it's a way to add Oxygen at the roots despite the too-wet sphag. I've done this to tropicals and orchids for years with no harm.

When I see wrinkled and yellow leaves, I look at the roots. With the magnitude of decline you describe, with green leaves wrinkling, it's very likely they are not good enough any more to support the plant. Some think of this as excessive tinkering. However, when a plant suddenly declines it makes sense to me to find and correct the problem. There's usually some problems below.

If the roots are all gone, it makes sense to paint some rooting hormone, and repot into loose sphag in a much smaller (clay) pot.

I don't find this sets back a healthy plant much (if you have light fingers) and if the plant really is damaged, you have given it it's best chance.

About your spikes, use your own judgment about whether the plant can support the spike. If you leave it on and the plant really is in dire straits, the flowers will die fairly quickly anyway. You can cut them off and put in water, and they usually last fairly well. Your call.