Geez, maybe they think they are Guineas
Take a picture of it. And if it has a door, open it and take a picture of the inside.
We weren't supposed to have rain last night. We did

I guess your rain came here.
With good reason!
Likely impossible to find one made of natural rubber.
They are used on big commercial griddles too. I've seen some that must have been 9-10" just on the flat metal part. Watched a cook at "Five Guys" flipping burgers with one.
No floor drain or shower stall I guess? Is there a sink with a counter big enough to hold the dehumidifier? A bathtub? Way better and easier when you can let them drain as they work. None of those in my basement but there is a condensate pump under the propane water heater so I ran the drain hose into that.
I had one of those, I think it heated up the room as much as it cooled it off. Gave it to Goodwill.
Usually easiest when you can take them off the roost in the dark.