Just as the summer travel season gets into gear, Canadians and visitors could find themselves waiting in long lines at the border — delays that could also deal a blow to the economy.

It all depends on what happens with a potential strike by workers at the Canada Border Services Agency, which could start as soon as Thursday.

More than 9,000 Public Service Alliance of Canada members who work for the CBSA, including border guards, have secured a strike mandate. The two sides go into mediation on June 3, and the union will be in a position to strike as of June 6.