after major snow melt and rain, my drivers and passengers front floor is soaked???

[dna]

We had a ton of snow up in Vancouver (Canada) this year - so much that I did not bother even clearing the snow from my H2 roof (I have a full Gobi rack which makes it much harder). Anyway, I've had about 6" of snow up there for weeks, and just earlier this week we finally got the warmer weather and rain. After a few days of no driving, I came to the truck to find the front floor (on both sides) totally soaked. I pulled off the plastic door sills, and there was 1.5" water throughout.

I obviously got the shopvac and sucked up as much as possible. Though 30 minutes later (no rain or anything), another 1/2" was in the sill area. I think this 2nd water was the carpet liner/mat slowly seeping???

So my question - has anyone else experienced flooding or leaking like this? I checked my weather guards along the doors and they seem fine. Also the headliner is dry (both on the inside roof and sides), and the door plastic inside is dry???

I think it may be the running roof lights (the orange ones on the front).

Any advice would be appreciated as I'm sure prolonged moisture is not a good thing.

Thanks