The Celtics won their fifth straight and for the first time in almost a month have climbed two games above the .500 mark. Their high water mark thus far this season came when they had a 12-9 record on Dec. 12.
Boston had a 16-point lead midway through the third quarter, but Houston cut it to one with 7:22 to play. The Celtics then ended the game on a 20-9 run.
Houston was led by James Harden with 24 points. He had scored at least 25 in 14 consecutive games.
Texas principal bans speaking Spanish, stirs controversy
Toddler uninjured after being knocked over by Obama family dog