Break off suckers from mature plants and bury the stem.
Keep the ground moist.

Start now and do more at weekly intervals if you have room to keep planting them.

We have already started our tomato cuttings. We took a few cuttings from some of our best summer performers, potted them up with fresh compost, and they are sitting on the back patio ready to get put into the ground once our fall garden beds are completed. The key is to bury the cutting DEEP since the stem is full of little roots; the deeper, the better. You can also use ''rooting powder'' (available at any nursery or garden store) to help them out. We prefer to grow our fall stock from cuttings rather than seed since it is always SO HOT this time of year. Good luck!

Thank you both for responding.

I'm hoping some of my indeterminate plants
Will revive and produce again when it cools off.
So I will have to dig a new place for the cuttings.
And I'm not about to go out there & dig in this heat!
So, they will have to be started in pots.

Looks like I'd best get them started!

Rusty