I don't think couple of weeks of no sun would cause that; more than likely it is soil being wet from constant rain.
Where are you located?
Is it all succulents you are talking about?
What kind of soil are they planted in?
Do you have any photos?
Rina

Well, it's been rainy for a majority of the last month or so, but it's only been the last week and a half that there has actually been no sun at all. I'm in the North Houston area and all of them are succulents except for one. The only one just fine is the supervivum (the non succulent). They are inside actually, in 50% potting soil and 50% manufacturer's sand. I've never had a problem until now.

Manufacturer's sand has very, very large granules. I've tested the drainage pretty well. I'll check the root though and see how they're doing. Thank you :)

Has the plant been moved to a different location recently? Do you ever pull up the Venetian Blinds? Where do you get "Manufactures Sand" by the way?

Your plant is very etoliated - stretching for light. Above post is explaining it well, also about the sand.
Sempervivum is a hardy succulent and shouldn't be kept inside. They overwinter in zone 4, even lower. I would definitely plant it outside. This is how few of them look after overwintering outside in 'cold Canada':

Any other (tender) succulents will also benefit from being outside - obviously, if there is too much rain they are better off protected from too much water. But that kind of etoliation doesn't happen in 1-2 weeks. I think they have been kept in insufficient light longer than that.
And I would change the soil - if you can get lots of grit into your mix (not sand!), drainage will be much better. Make sure that any container they are in has drainage hole.

Rina