Boiling fluid?

[SHANE 73Z]

Hey guys,

I am just wondering if anyone has ever seen the fluid in the MC boil from underhood heat. I am having a little trouble with my brakes now that the weather is hot. When first getting into the car cold, the brakes are working fine, but as the temperature (engine/underhood) the pedal gets soft. One pump gets it right back but Id like to get it fixed. Am I correct that the boiling point of brake fluid becomes lower every time it boils?

The MC is an all aluminum dual master/bias bar arrangement from CNC. The car is a 73 Camaro with a stock flat hood (no air gets out). I am open to suggestion. I was thinking a heat shield would be my first idea.

Thanks in advance,
Shane