The Sounds tallied three times in the sixth, and then the rains came, giving the visitors a 4-3 victory in a six-inning contest at Iowa.
Heether finished 1 for 2, while winning pitcher Sam Narron was 1 for 1 with a double and is hitting .348.
Narron (6-3) allowed seven hits and three runs in five innings. Ben Howard got credit for his first save with a scoreless sixth.
The Stars (17-12) moved into a first-place tie with their third consecutive victory over the Smokies, a 4-2 decision that featured a three-run fifth inning.
Nashville got an RBI single from starting and winning pitcher Nic Ungs to start the game-deciding rally and left fielder Michael Brantley's run-scoring triple. The latter came home on a wild pitch to give the hosts a 3-1 lead.
Ungs (3-0) allowed eight hits but only two runs in seven strong innings, lowering his ERA to 2.16. Patrick Ryan registered his sixth save with four strikeouts in two innings.
Second baseman Mike Bell finished 2 for 4 with a double and Ungs went 2 for 2 to raise his average to .556.
With rumors circulating that outfielder Darren Ford would be traded, the Manatees (11-17) rallied for their third straight victory.
Shortstop Yohannis Perez's two-run homer with nobody out in the seventh gave the hosts a 5-4 decision over Clearwater.
Starter Chris Cody scattered eight hits and allowed only one run through in six innings, lowering his ERA to 2.52. However, Travis Wendte got tagged for three hits and three runs in only a third of an inning. Mike Ramlow (1-0) got the victory with 2.2 hitless innings.
The hosts' offense was cooled off as the Power scraped together four singles through seven innings and finished with six, dropping a 2-1 decision to Columbus to fall to 21-8.
Lefty Daniel Merklinger worked the first four innings, giving up two runs on four walks and seven hits. Right-hander Reed Dickert tossed the next four, whitewashing Columbus on three hits as his ERA dropped to 2.50. Corey Frerichs then struck out two in a perfect ninth.
The Brewers led 2-0, but host Casper dominated after that, scoring nine unanswered runs en route to an 11-3 victory.
Third baseman John Delaney stayed hot with three hits and two runs, and second baseman David Fonseca and shortstop Michael Marseco each finished 2 for 4, but it wasn't enough to keep the visitors from slipping to 16-15.
Starter Santo Manzanillo (0-1) allowed seven hits, three walks and seven runs in 3.1 innings and Efrain Nieves wasn't much better, giving up four runs on five hits in 1.2 innings. However, Garrett Sherrill finished with three scoreless innings.
All of the scoring occurred during the final two innings of an error-filled contest, and the Brewers came up short, 3-2, against the Rangers.
First baseman Cameron Robulack's two-run single gave the Brewers a 2-0 advantage, with both runs being unearned, in the top of the eighth.
However, the Rangers registered three hits and scored twice against recently signed Jacob Odorizzi, the first runs the right-hander has allowed, and the hosts then reached unfortunate reliever Brandon Rapoza (0-2) for the deciding run with two outs. A walk, stolen base and throwing error brought the run home.