CONCORD, N.H. — New Hampshire tourism officials say they’re expecting more than 640,000 visitors who will spend more than $91 million over the Labor Day holiday weekend, breaking a record set last year.

The Division of Travel and Tourism Development said Thursday the numbers are expected to be up 3.5 percent for visitors and 4 percent in spending over a year ago.

Tourism officials say it’s been a strong summer.

“The Lakes Region had an incredibly strong summer season, featuring a growing trend of visitors starting their weekend trips a day early on Thursdays,” said Amy Landers, executive director, Lakes Region Tourism Association. “Both outdoor and indoor attractions throughout the region reported excellent growth compared to previous summers.”

Susan Logan, manager of marketing and events for the Conway Scenic Railroad, said there’s been a significant increase in international and distant domestic travelers the summer, and this weekend is looking good, too.

“On Sunday, we’re running our Notch Train all the way to the village of Whitefield, the first time that a passenger train has been there in over 30 years, and that train — with nine passenger cars — is all but sold out,” she said.

Some attractions are remembering the victims of Hurricane Harvey. In Lincoln, Clark’s Trading Post and White Mountain Central Railroad are matching up to $10,000 in public donations to the American Red Cross.

“This coming holiday weekend should be a time of relaxation and celebration around the nation as the summer draws to a close, but for you we know this will be another few days of survival and confusion as the full scope of the disaster unfolds,” the organizations said in a news release.

Other attractions, such as Alpine Adventures, Whale’s Tale Waterpark and Candia Springs Adventure Park sent a truckload of food, school and personal items to the Bristol Fire Department to aid in their collection destined for Texas.