Miami and Houston stretch NBA win streaks to four games
Also stretching their win streak to four games were the Houston Rockets, who got a strong performance from Kevin Durant in a 120-96 victory at Brooklyn.
Powell made seven three-pointers while Jaime Jaquez scored 19 points off the bench, Andrew Wiggins added 17 points and Bam Adebayo contributed 15 points and 14 rebounds as the Heat improved to 19-15.
The Pistons suffered their third loss in four games in falling to 25-9, still the second best record in the NBA behind Western Conference leader Oklahoma City (29-5).