I don't know why people keep posting saying "fog lights never break on other cars so why do they break on the civic" (or similar). I've seen
loads of broken fog lights on other cars!
On my Ford Focus, I got through 4 of them in a year and then decided not to replace them anymore until it was up for sale. I haven't driven it since then and they're fine

My girlfriend has a Renault Megane and both lights went in a few weeks and we've elected not to replace them on that car either until we can get some polycarb covers fitted.
The Focus's foglights are
MUCH more sturdy than the Civic's. The front glass is really thick and they still break just as often as the civic's. It's not heat damage as some people are suggesting (do you have any idea how much temperature difference you need to crack glass?! You pretty much need a blowtorch and some ice. The piddly little 30W bulbs are never going to get the glass hot enough to crack it - besides - most people have said they were off at the time). I'm quite positive that the smashed lights are caused by stones at high speed. A 1 pence piece thrown casually at the center of a light breaks it (yes I did this accidentally by a very unlucky co-incidence when I kicked a penny on my drive!!) so what do you think a small stone at 50-90MPH will do? Anything larger than a pea at 40+ mph will definitely crack the glass.