No, Those flowers are toast. But you'll get more that will fruit. I won't. Our season ends in June.

Nancyjane - I'm in the same boat as you and much of the western US this week. I got my plants in late (mid May) due to lingering cold weather here. I only have 6 plants and maybe a dozen fruit set so far. We've been in the upper 90s for the last few days and will be around 100 through Sunday before it cools back down into the low to mid 80s. I'm hoping for a lot more fruit set in the later half of June before it gets too hot again.

I'm expecting triple digits for the next couple of months, so my tomatoes are done. I cut them down, add more shade and keep them alive until they start growing again around Labor Day.

I hope you don't have to go to such extremes and they'll come back earlier, but I would recommend a shade cloth, 25% max. I use aluminet that also reflects sunlight.

It's really about air temperature, and not sunlight. So I'm afraid shade cloth and reflectors won't do much good for letting tomatoes fruit. In those kinds of temperatures, though, too much sunlight will seriously stress the plants. So in the interest of future tomatoes, you might consider protecting the plants that way.

I will disagree. Shade cloth works remarkably well, even though you may be only slowing down rising temps, or keeping them down longer a couple of degrees in the morning. This is a study from Maryland. I followed their guidelines when I lived there (upper 90s to low 100s in the summer), and had great results with fruit set. There's a longer version available but I can't find it now. It's just a good tool to use, unless you are farther north.

https://marylandgrows.umd.edu/2016/08/26/shade-cloth-can-increase-tomato-yields/

That might be possible. Out in the open, the air temperature is the air temperature, whether you're under shade or not. The sun doesn't heat up the air directly. But if the sun is shining on something, the air temperature close to it could be elevated. But if the out-in-the-open air temperature is already too high, shade isn't going to help. Here, in the summer, the nighttime temperatures (75-80F) are already too high to permit tomato fruiting, so shade won't make any difference. That's because of the humidity. But if you're in a drier part of the country, your nighttime temperatures may fall low enough that daytime shade will keep them low for a while. So, it depends.

Just ordered some shade cloth 70% for the tomatoes.

They still get 6 hrs of direct sun before being in the shade cloth.

OkieHU

Dan, just give it a try next year. Do a side-by-side comparison and see if it works for you.

OkieHU, 70% is too much shade! As I mentioned above, 25% is the max recommended even for desert gardening. With a shade cloth above 25%, you will really slow down flowering and ripening. I use a 50% cloth for my fall-planted greens (lettuce, arugula, chard) and it keeps them productive until the weather heats up. 75% seems more appropriate as a patio/livestock cover, but I may be wrong. I've never used anything over 50%.

I am compelled to offer a little more evidence. My cherries are on trellises that are aligned E-W. That is, one side of the trellis faces south, and the other faces north. The latter side is in permanent shade. No direct sunlight ever hits it. So if shadecloth is going to extend the fruiting season for tomatoes, by keeping things cooler, you'd expect the north side of the trellis to keep fruiting as it gets hotter, while the south side stops fruiting. That simply doesn't happen. Everything stops fruiting at the same time.

Interesting Dan, I've never had my Sungold cherry tomatoes stop setting fruit due to excessive heat up here. They seem to keep pumping them out when the temps are consistently well into the 90s even as the larger varieties have shut down.

Maybe it cools down enough at night here to keep them going but doesn't down in Texas.

Dan, LOL, just give it a try and find out! You really like these "apples and oranges" comparisons (or cherries in this case...)

I'm saying I've tried it every year. I use foliage, rather than netting to provide shade. Maybe others have more luck, or there is something thermally magic about netting, but shade doesn't work for me.

Well into the 90s and you get fruit set? Ha ha. In a few weeks we'll push 100F every day for the next few months, and low temps are 75-80F. Dew point is rock solid at 70F. Of course high humidity also makes tomato pollen sticky. You northerners. Sheesh. Of course my melons and peppers are doing riotously well.

lone jack I think Sung olds are a whole different breed! Nothing stops them! I had to stop growing them when I retired cause I didn't have a dozen people to give them to!

We are near the coast, so we do cool off at night.

We're having another couple more 100* days coming up, so I'll try shading. Can't hurt!