Blame it on the heat.

August is always silly season on Wall Street, when the A-team is usually on vacation in the Hamptons or off on some yacht, soaking their feet in cool waters.

Without that ballast, the slightest event can cause instability — in the markets and, it seems, in people.

Add to that usual recipe for a lazy, hazy, crazy month a zany presidential election and I can see how conditions could exist for weird things to happen.

But that still can’t explain the Twitter feud that broke out recently between Mark Cuban and Carl Icahn, two very public 1 percenters.

Icahn, a supporter of Donald Trump, seemed to get under the skin of Bad Boy Cuban, a Hillary Clinton backer, by taking a critical view of the Democratic nominee’s recently unveiled economic plan.

“How do you unleash the power of corporations if you do nothing about the strangulating regulations, which she said zero about,” Icahn tweeted.

“@Carl_C_Icahn sure hasn’t stopped you from investing in companies Carl, has it?” Cuban tweeted. “Regs can improve, no doubt, but trump plan is a disaster.”

“[I]t sure has stopped me and thousands of others from making capital investments in companies,” Icahn replied. “Cap spending is way down b/c companies r worried about onerous regs – which is diminishing productivity & our ability to compete.”

Wow. After three rounds, my score card has the 80-year-old Icahn leading 3-0 over the 58-year-old Cuban. While Cuban has a weight advantage, Icahn is clearly outsmarting him by constructing an unassailable stance.

Icahn tweets about “strangulating regulations” — which, by definition, is just about the bad regs, i.e., the ones that strangle business.

It’s like when politicians fight against wasteful spending in the Pentagon budget. Even the most hawkish lawmaker can’t be in favor of wasteful spending. Politicians — and smart folks like Icahn — carefully craft arguments to be bulletproof.

And Cuban walked right into Icahn’s right hook. He should know better.

Maybe the heat is getting to him.