When I lost the brakes, the pedal was hard too push, but did go down some (not to the floor).

I have a 2006 XC90 2.5T with 67K miles that runs great. This morning, after a rainy night, i drove about 50 yards and there was a temporary loss of brakes. I pushed down and nothing at all (no ABS, no grinding, etc.) After 3 seconds I got the brakes back and all was normal. This same loss of brakes ...