For anybody in Texas or other super hot summer areas. Are you moving your potted trees into the shade? Our temps in Houston right now are in the low 90's, which is just the start of summer for us. The temp of my unshaded potted trees has been around 92 degrees(way too hot) and the shaded trees are around 84 degrees(still pretty hot). I have a variety of container types and colors so there is slight variation in temps.
I have a sprinkler timer setup where i can water them up to 16 times a day at different intervals but water is not the issue so much as ambient air temp around the roots...even with repeated waterings the temp of the soil really doesnt drop significantly due to the top few inches of potting media being the only part saturated. I can tie into my drip line that i have on my tomatoes but i think even with interval drippings fully saturating the soil it will still not reduce the air temp around the roots to less than 88 degrees or so.

So....I think im going to move all my trees to a heavily shaded area.

Last summer they basically shut down from june to sept so my logic is that i can keep some minimal growth throughout the summer in the shade.

Thoughts?

I have put some window screens (temporary) to block out some of the hot sun rays......92 degrees is a cool day over here compared to 109 degrees Mon and Tuesday....LOL

Justin, I can only give you what I do here in  West Central Georgia. We are generally in the upper 80's to low 90's at this time of the year
until the first of October. I keep mine on a cement driveway which I am sure is as hot or hotter than the temps you are reporting. I water
my trees about every three days and I soak them until they are saturated. They are in full sun everyday and look healthy and productive.
I use a soil on all my potted trees that retains moisture. I use either Fertilome UPM or Fafard 3B Mix.

Justin,
I am in SoCal and our temps were in 100s for quite a few days.
I moved 1 gals into a partial shade while 3 and above gals keep in the full sun but covering the pots keeping them cooler. The figs love the sun ( and lots of water). They are all covered in figlets.

Only smaller pots should suffer.  5 gal or higher should not have much trouble sitting in the sun.  I use white 5 gal buckets and they do fine.  Painting the smaller containers to a light color can help.  Or shade the pot, not the tree.  Mostly, it's the sun shinning on the pot and soil that will heat up the roots (especially black pots), not so much the air temp around the pot.  If the tree is leafed out good, it will help shade itself some.

Can pile up mulch against the south side of the pots..  or lean a 1x6 or 1x8 plank against the pots to shade them.

I'd be careful about over watering them.  If they are well established and well drained, you can flood them twice a day.. morning and late afternoon on very hot days.  If it's cloudy and doesn't get too hot one day, i'd skip the afternoon water unless you see wilting.  You can drip some during the day if they are drying out too much.  But don't keep them soaked all day.

If you can find a way to shade the container without shading the tree, it will be happier. Watering will help with lowering container temps. Typically, the "cold"water coming out of a Houston tap is not less than 75F. If you water once per day, do so in the evening, or the temps will rebound quickly.

As mentioned, the size of the container matters. You could, however, employ a pot in pot method for smaller containers to add mass without substantially increasing the amount of water needed. Put some mulch in the bottom of a much larger (preferably light colored) container. Put the smaller container in the larger one. You want the top of the smaller one just below the top of the larger one. Fill the larger container with mulch. When you water, it just needs to go in the smaller container. The roots will grow into the mulch. If it bothers you, remove it once a month +/- and trim the roots.

Full sun all the way. I have some in pint size pots that get watered once a day. They are on grass and get late afternoon shade. The rest of the pots are in full sun, no pm shade. They are doing well. It's been up to around 113 lately. It only goes down to around 95 at midnight.

Great advice from so many! 

I just want to add that the water evaporates and cools the soil, its not so much the air temp around the pots as the temp in the pot, where the roots are.  With full sun on the pots (especially dark or black pots) temps in the pot can get much higher than the air temp.  There was a thread a month or so ago, where one generous member did a test with different types of pots, and the black pot was much hotter in the root zone.  

Which is why so many gave the good advice to shade the pots, not the tree.

Wrap the container and shade as much soil as possible with aluminum foil. Most of the heat in the pot is coming from the sun's radiation being absorbed not conduction or convection from the hot air. Aluminum foil is a very effective radiant barrier and will keep the soil much cooler when in full sun.

http://en.wikipedia.org/wiki/Radiant_barrier