Help! 4 weeks into flowering

This is my first grow and haven't really asked for help. Basically got this far with the help of google. Now I'm stumped and need some assistance so thanks in advance.
I went on vacation to south beach, Florida for 2 weeks and left my brother in law to care for the girls. I came home and this is what I had waiting...WTF (excuse the French). How to I turn this around? Is she save-able? Can I trim off those messed up ones even though she's in flowering?

Here's alittle bit for information on the girl../

* growing in fox farm soil as well as using the fox farm beginners trio
* using t5 and 6 cfl surrounding the sides
* no ph problems
* 4 weeks in flowering

I don't know but man they look sick I'm on my first grow in 4 years and this is the nightmare I keep having good luck bro I hope someone can help you

welcome to RIU @Warmac

so what did your "caretaker" say that they did-i.e., did they follow your instructions? if not, what didn't they do? that doesn't look like just two weeks of neglect. she looks like she could go for some plain water right now.

For one you temps are too high for that low a humidity. According to your pic its about 90 with a humidity of about 47ish.

You need to be around the orange color. You need to drop your temps or get that humidity way up. At 90 you should have humidity around 80%. Your plants close up their stomata when there is such a large vapor pressure deficit and can't intake co2 through their leaves and they will slowly die.

looks like your temp is close to 90F. much too hot for an indoor grow. I'd whack 'em and start over when the temp is cooler.