Travelers stuck at Harry Reid International Airport this weekend got the ultimate “you’re not going anywhere” announcement after the mercury hit a blistering 114 degrees: The plane was simply too heavy for the thin desert air to lift it off the ground.

In a viral video circulating online, gate agents at an American Airlines terminal can be seen pleading for 50 volunteers to sit this one out — or nobody was leaving Sin City.

“It’s 114 in Las Vegas. Pilot says it’s so hot that the plane cannot take off with full weight,” the overlay on the clip reads. “They ask for 50 volunteers to not board or the plane won’t take off. Wild.”

One social media poster captured the collective eye-roll perfectly: “I wonder how many people looked around, tried to spot out the bigger ones, and nodded like, ‘Yep, I think you need to sit this one out.’

”Extreme heat thins the air, reducing the density that wings need to generate lift and engines need to produce power. At high-temperature, high-elevation spots like Las Vegas, airlines routinely have to ditch cargo, fuel, or — as a last resort, actual human beings to stay within safe operating limits.

Passengers in the terminal looked less than thrilled as staff worked the gate, with some already muttering they’d rather walk than risk it. “If I hear the plane is too heavy, ain’t no way I am getting on that,” one online commenter declared. Others said they’d volunteer just to avoid trusting the math.

It’s the latest headache in a brutal heat wave baking Southern Nevada, where the airport itself clocked 114 degrees Friday afternoon. Flights have been delayed, diverted, and weight-restricted across the Southwest for days.

No word yet on how many travelers ultimately took the airline up on the offer or whether any “bigger ones” got the side-eye, but one thing’s clear: In Vegas, even the planes are learning that what happens in the heat stays grounded.