I've lived in the central valley (for as short a time as possible), and while it doesn't get quite as hot here, it gets plenty warm! We are in So. California, but not near the coast so we don't get the cooler air off the ocean. We will easily be over 100 for days at a time. Last summer we raise cornish through August and it was a mistake. This year, I feel we are pushing it just to take them to mid-July. I'm hoping the red rangers do a little better in the heat, but if they don't, we will know better next year! At least we aren't raising a batch for every week like we do with the cornish the rest of the year. I think we are only getting three batches of the rangers.