This could be leaking from the firewall or the windshield. You best bet is to take the lower panels out from the area where you see the water coming in. Get in the car with a flashlight and ask someone to spray water from a hose on the car. You should be able to see where it's leaking from. Report back and we can guide you further.
If you prefer to have a shop take a look, use this link to find one near you.
https://repairpal.com/repair-shops
Alex
A friend told me the same thing about his Toyota,but his is a car. we had a lot of rain for about a week straight a couple months ago and he said man I have a leak from all that rain,it's got my passenger side front carpet soaking wet? I told him that's not rain,your A/C condensation drain is clogged up,and he asked how do I know that? we were at a store talking for 10 minutes or so and he was running his A/C at that time,so I said back your car up a little,he did and NO water had dripped on the parking lot at all! his was easy,I pulled his carpet back and there was the drain hose coming from the reservoir to the floor board,so I got a large cup ready,disconnected the drain hose from the reservoir and no water came out of the FULL reservoir,so I inserted a piece of 14 ga wire in there,in/out/in/out,then some leaves came out plus a pint/quart of water,it was clogged! pulled the grommet and hose from floor,made sure it was free of debris and it wasn't,cleaned it out also,no problems since.if you run the A/C and you don't see a puddle of water under your truck,then it's draining in your floor.if it is draining under the truck,then I'm wrong and you should see Alex answer.
I’ve found leaks that actually started on one side of the vehicle but was running all the way to the other side.. Just saying..