Battling Heat and Humidity in the Garden

I have been battling high temperatures and humidity in the garden through this last heat wave that is gripping our area.  The result of this has been almost daily violent storms in the area all around us but not hitting us.  I've had to resort to deep watering every other day.  The tomatoes don't like the high heat so aren't ripening quite as quickly.  I've lost a few of my container plants but