Their wedding photographer, Alex Neary of Wildeyed Photography, put out a call on Facebook for help, according to CTV News.
Hundreds of offers followed from bridal shops and former brides.
"At the end of it, there were two dresses that I loved," Boissonneault said.
She added that the bridal shop, which the Toronto Star reported was Lea-Ann Belter Bridal, said she could have both dresses.
As for the Toronto, Canada, ceremony? "It was perfect," Neary said. "It was a little chilly, but other than that it was amazing. Everything went according to plan. They were just so happy."
"I'm happy to be married; my husband has been so amazing, so supportive," Boissonneault said. "He thinks it's awesome that so many people reached out."
Boissonneault plans to pay it forward by giving free massages to firefighters in Fort McMurray when she can return.
"There are no words to describe what I want to say," she said. "All I can say, really, is thank you so much from the bottom of my heart."