Water on passenger side floor - leak?

I’m cleaning my truck this morning and took the floor mats out to clean the carpets and I noticed a lot of water beads under the passenger side floor mat.
I’m in Washington and we’ve had the rainiest start to the year. I’ve read about people with the brake light leak but has anyone else heard of a leak like this?

I’ve already got an appt setup Monday at Toyota

I’ll see if I can post a pic but not sure if that can really show anything
Edit you can see some of the water beading on the floor liner

 

Pull the engine cowl off and check to make sure the deflector attaches to the bottom side of the cowl is still attached. It’s plastic welded on and sometimes will fall off allowing water into the hvac hole in the firewall. There’s pics around of what I’m talking about.

 

Might not be your exact problem, but there's a thread on water from the passenger side...

https://www.tacomaworld.com/threads/significant-leak-passenger-side.619833/page-2

 

if you have a sunroof, you may want to clean and clear your drains. common water leak. Ski

 

Be sure to check the entire Door seal. Water can come down the outside of the door seal and slip under the seal then ride all the way down to the floor.... Amazing how far a leak can travel from the source ...

 

Thanks all will check these suggestions out.

in the meantime I’ve been running a fan and heater in the truck and it’s dried out at least to touch but hope to get this fixed asap