Jack Herer - First grow

Have had to travel a fair amount recently. Thus have left plants in care of partner. Tried to set good instructions but as I am new, too - a couple issues did arise. 1) Plants went 48 hrs without water and temp inside tent reached 96 degrees. 2) Per the picture, appears that too much nutrients were provided, as you can see a bit of burn on many of the leaves. Yesterday I did a good flush for each plant with just water, and they are looking better this evening. My hope is that this interruption doesn't have too negative of an impact on yield and potency but we shall see.