My range hoods (2) both have CFL's and I've not had any problem with them overheating, let alone breaking. They are both shielded by plastic light diffusers.
I've been using CFL's since the times when they had magnetic ballasts in the 80's. I've never had one break its glass in use. The only times one has broken when I've dropped it handling it outside the fixture. When they fail, it's usually the electronics. I have a number of the FEIT 75 watt equiv daylight CFL's in enclosed fixtures... no problems... and the light is bright and white with excellent color rendition.