I thought it was a Ray Bradbury, but I can't seem to find it.
There's something going on where the world (or that town) is getting hotter and hotter, and there's three kids who have bikes. I think they go into this tunnel or something? And it gets hotter and hotter. I don't really remember, but I was hoping it might strike a chord in someone's memory.
I know it was a short story that was included in a collection of other short horror-ish sci-fi and fantasy stories. I think it had a red binding? I'm not 100% sure. This was something I read back in 8th grade a thousand years ago, so it might be a slightly hopeless endeavor. Somewhere back in 2003? I think.