By "extremely hot location" I'm assuming you mean the Middle East.
So, in my view, a lot is going to depend on two things: what your job is and how many hours a day you spend doing it, and what kind of equipment is available to you.
If you're working 8 or 9 hours and that weight set has 315 lbs., well I'd say you can make do without much guidance from any of us. If you're going to work 12 hour shifts in an Iraqi prison like one of my buddies was, you're probably not going to have the time or the inclination to lift much.
That being said, it appears you're experienced enough to know what to do if you can't lift heavy. If there's only 250 lbs. there, squat 250 in sets of 20 until you puke. If there's hills, run them. If there's cinder blocks around, slide them through the bar and add some weight. You know the drill.
Otherwise, focus on something else entirely. You compete in MMA? Find or fill a heavy bag and work your boxing skills three times a week. Find someone who teaches the military martial arts and increase your proficiency in them, with the intent to refocus on strength training when you return.