Tomato Plants Still Producing in the Heat

We've all heard about the problem with tomato plants in the heat.  Once it gets in the 90's you can forget having any  more tomatoes on the vine for a while.
Well even in 100+ heat my tomato plants have laughed at that notion.  I didn't see it growing but a few days ago I went out to check on the garden and saw a hint of red low on the tomato plant.  I figured it must be some trash blown in on the wind since tomatoes don't produce in high heat.
After getting a closer look I was surprised to find a little tomato a little smaller than my fist, shiny and red.
The reason it grew was the bottom of the plant was protected by a bit of grass that has grown up in the garden, soon to be pulled once the temperatures drop into the low 90's again.

It's gone now though. I ate it...