The Hurricanes threatened to blow the Heat off the park as South Africa trump Migon du Preez (68) and Nicola Carey (31) launched a feisty chase of Brisbane’s hearty total of 6-174.
The pair put on 87 before Anneke Bosch outfoxed her Proteas teammate with a leg-side catch by Georgia Redmayne.
The next over, young gun Courtney Sippel (2-25) held her nerve to claim Carey, precipitating a collapse of 6-16 as the home side finished 9-156.
Captain Jess Jonassen, who took two early wickers, and pace ace Nicola Hancock, who was on a hat-trick in the final, ensured the result stayed with Brisbane.
The Heat girls will hopefully sleep well with a game tomorrow morning against the Melbourne Stars to wrap-up what was been a successful layover in Tasmania.
Hancock finished with 3-32 while Jonassen’s 3-25 ensured she retained her spot on top of the leading wicket-taker’s list with 12 dismissals so far.
Brisbane jumped back to the top of the ladder after the Melbourne Renegades had earlier assumed the No.1 position following their win over the Sydney Sixers.
The Heat have shown their confidence in winning both chasing and setting a target and the opportunity to bat first in the Launceston evening did not appear to faze them.
After another solid power play, the Heat openers steadily accelerated their scoring, getting the run rate towards 9 runs an over.
Harris continued on her merry way in the tournament, starting in a measured fashion as she allowed Redmayne to lead the charge before dramatically upping the ante.
She took 16 off a Sasha Maloney over and then nabbed another 13 out of a 17-run over by the Heat off spinner Amy Smith.
Harris powered to 75 from 51 balls, with six fours and two sixes before she was run out when a second run wasn’t in the offing on the first ball of the 16th over.
Redmayne was one of six wickets in fall in the final four overs, producing 64 from 50 balls. Georgia Voll hit a cracking six in her 12 runs as wickets tumbled while Brisbane pushed as hard as it could to post what turned out to be a match-winning total.
Harris (223 runs) continued her stirring form so far in the tournament, as she became the first woman to go past 200 runs in the competition, with opening partner Georgia Redmayne (191) not far behind.