The Heat, on the seventh game of a seven-game road trip, looked ready to go home.
Miami scored just 45 points in the first half on 35% shooting.
But the defending Eastern Conference champs came to life in the second half in their 108-94 win against the Thunder on Monday night in Oklahoma City.
The Heat outscored the Thunder 34-23 in the third quarter, and Miami started the fourth quarter on a 15-0 run.
It took the Thunder six minutes to score its first points of the fourth quarter, and Miami’s lead swelled to 18 points.