Bicycle Mechanics - Heavy Rainstorm, Brooks Saddle: Now What?

Rode home in a real downpour -- 50 minutes of solid rain. I don't have any leather-treatment goo in the house, I don't think. (Maybe a tube of NikWax something for a pair of boots?) My question is: Is there anything I have to do tonight so the saddle won't be ruined? Any basic household item that will save it in a pinch? Like hair conditioner? Butter? What would McGyver do?

let it dry normally at room temperature. Treat it with Proofide or similar when it's fully dry. That's what Brooks recommends, and they should know.

Brooks says to let it air dry naturally. Give it a dose of Proofide or something similar after it dries.

As above.
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(who thinks that Proofide is a boondoggle and uses Pecard's leather dressing on all his Brooks and Ideale saddles)

I've ridden my Brooks saddles many times in the rain. I don't do anything to them afterward.

Mine has gotten throughly soaked a few times and just letting it air dry has been fine.

I use Sno-Seal beeswax once or twice a year on it.

As others have said, let it dry and then treat with Proofide. It's happened to me. Also, keep in mind where Brooks' saddles come from - UK, not known for it's dry climate.

A saddle's getting wet isn't a big problem compared to riding it while wet. Wet leather stretches much more easily, I think, and hammering away while sitting on a soaked leather saddle can permanently alter the shape. Again, I would recommend treating it with proofide after it dries. And it's also worth having a rear fender or under-the-seat-pack or something which keeps spray off the underside of the saddle when riding in the wet.

I once had a Brookes saddle that was agony to sit on for any length of time. Road it in the rain and it form fitted to my bony butt. Was very comfortable after that. I Sno-Sealed it once a year whether it needed it or not.

Sno-seal or other leather-treating beeswax, once it's dry, is the way to go.