Hundreds of dresses are being shipped from Estevan, Sask., to high school graduates in High River, Alta., who lost their dresses in the recent flood.

About 13,000 residents of the Alberta town left their homes under a mandatory evacuation order that was issued June 20, after the Highwood River burst its banks and flooded large parts of the community.

Tanis Savill, a high school teacher in Estevan, said she had heard there was a need for graduation dresses to replace the ones lost in the flood.

Savill said she initially expected to donate 20 dresses, but she received more than 300.

"We overshot, so I asked her if that was a problem," Savill told CBC News in an interview.

"She said there [were] three other high schools with the same situation, so she was pretty sure she could pass them on."

Savill said she and many others in Estevan remember when their community was hit by flash floods in 2011.

"Houses were completely gone and the cars were the only thing left. I mean, it was devastating," she said.

"We had so many families affected by that two years ago and were still recovering from that. So we get it. We understand."

On Monday, business owners in High River's central commercial district are expected to be allowed back in the community.

As well, residents of southwest High River will be the second group of homeowners allowed to return to their homes.

Graduation ceremonies in High River have been postponed until later this summer.