Brakes Failed problems of the 2010 Acura TSX

Brakes failed on three consecutive days during cold spell (teens with wind chill -10 to 10f) the first time I had pulled out of a parking space at the supermarket and was heading towards the exit. I noticed that the car was not slowing as I approached the street although I was exerting considerable force on the brake. I managed to stop the car and pull to the side of the street. I checked for any physical obstructions and did not find any. The brake pedal would not travel. After a few minutes the brakes resumed normal operation and I was able to carefully drive home. The next morning, I pumped the brakes with the car off until the pedal would not move. I then turned on the ignition and noticed the brake would not go down again. I had to wait a few minutes until it functioned again. Third instance, I started the car and pumped the brakes several times. The first couple times it worked but then it froze again. After some more time, the brakes engaged and I took the car to an auto repair shop. This is a very dangerous situation and I feel fortunate that I did not run anyone down in the crowded supermarket parking lot and the street was clear when I couldn't slow the car and rolled into it.