Technically, BlackBerry phones aren't certified as water proof and/or resistant.. There is this YouTube video though which showed a Passport and a Galaxy S7 being submerged in water..
I got soaked under the rain, with a weather resistant (ish) jacket, my passport was in the chest pocket and when I took it out it was somewhere between humid and wet; no problems but I won't be chancing it again.
My Z10 died when I bumped it into the sink while the water was running during a shave. Only took a second in the drink, but no coming back. I very quickly scooped it up out of the sink, btw. Got a Passport and haven't looked back.
My Passport managed to survive a few seconds under sea water before I got to it. Lots and lots of rain, spilled drinks and juice more times than I can count, oil, steam in the shower... You name it. And it never failed or felt something wrong with it. So maybe it is.
I took my Passport on an ATV ride that involved a lot of water. I put it in a gallon ziploc freezer bag. That afternoon I had to get something out of the box and found my Passport in the bottom of a ziploc bag of dirty water. Like some dead, carnival goldfish. It was "on" when I put it in the bag.
I washed it off with a hose and left it on the dash of my pickup the entire next day.