What do Southerners say when it's hot?

I'm curious, could you elaborate on the cultural nuances behind the question "What do Southerners say when it's hot?" It seems to imply a specific colloquialism or phrase that's commonly used in the southern regions of the United States during hot weather. Is there a particular saying or expression that Southerners tend to employ in such situations? And if so, what might be the historical or cultural context behind this saying? I'm genuinely interested in understanding the linguistic and cultural aspects of this question.