A passenger plane waiting to take off at Shenzhen Baoan International Airport on Saturday was turned into a “sauna” after humid air from outside entered the cabin through its air conditioners, Sznews.com reported.

A passenger in the plane, which was delayed, posted pictures online of the cabin shrouded in steam.

At least 42 flights were cancelled and 33 delayed after the airport issued a “blue alert” for a rainstorm that hit the city on Friday.