Ok....I had an incident last 2 weeks that I have never experienced before. I was taking a leisurely drive after work to the store when I noticed something wasn't right. My hilux seemed to pull a little to the left and just seemed underpowered. I pulled over and saw some smoke coming up from underneath the hood. To my surprise (and relief it wasn't something else)....it was because the left front disc brakes were extremely hot. Apparently, they were sticking and friction was doing what it does best....create heat and frustration. The rotors were literally about as hot as I could imagine them being without catching everything on fire. Given I was in no hurry....I just pulled over and allowed them to cool. I couldn't believe that they would hiss water being sprayed on them for what seemed like a long time. I managed to soak them in some deep creep to help them cool and free up whatever was stuck. I just keep on spraying water on that brake until there's are no smoke and straight away go home but the problem is keep on going and now I need to prepare a bottle and whenever I want to pulled over, that place must have a water.

Based on what I described....what exactly happened here? I realize that the brakes on that ONE wheel were stuck...but what would cause this? Is there anything specific I need to check for to see if the heat caused something to need replacement? I realize the rotor and pads would be obvious suspects for needing to be replaced after this incident....but they seem ok (to my amazement).

Thanks for any and all comments.

not a cold water, a water from drain or any water I can find near the road, so basically what the main problem?is it the brake master cylinder or the brake caliper didn't work well?