You say New Orleans, but fail to tell us important considerations like nearby structures and street trees.
You may already have western protection.
Summer shade cloths are being experimented with, but I'd probably try gardening the way I'd always done it and adjust after observation.
While many tomatoes may stop setting fruit after temps stay above 90 degrees, there are plenty of cherry types that keep producing.
While sun scald happens to peppers and tomatoes, you could try simply caging them and see if the natural foliage provides adequate protection...
Plenty of possibilities....
Found this:
http://www.tomatodirt.com/shad...
Incidentally, I've been growing Everglades tomatoes for several years.... The cats get most of them. And... They self seed...
Personally, I don't think they are sweet enough... Until after the temps cool...