The surge has overwhelmed local immigration officials and the army has been called in to erect tents to house about 500 people in Saint-Bernard-de-Lacolle, the nearest town.
The temporary facility is being built in anticipation of a large influx of asylum seekers from the USA, said Stephane Malepart, a spokesperson for the Canada Border Services Agency (CBSA).
The Canadian military said in a statement Wednesday that the soldiers will help the Royal Canadian Mounted Police and the Canada Border Services Agency at the site.
The IRB says that between August 1 and August 7 alone, 1,798 people showed up at an unofficial crossing from the US into Quebec.
Patrick Lefort, a spokesman for the Canada Border Services Agency, told the Canadian Broadcasting Corporation there is now a backlog of asylum seekers at Roxham Road, a popular crossing point near Saint-Bernard-de-Lacolle, Quebec.
Canada builds temporary camp near USA border to host asylum seekers
Last week, Montreal's Olympic Stadium was set up to handle asylum seekers after the YWCA became too crowded, but the stadium is booked for other uses beginning next month, said officials at a news conference, so the tent city is being constructed.
There are now about 700 asylum seekers waiting to be processed, many of them Haitians who were allowed into the United States under temporary protection status after a massive quake struck that country in 2010.
Such Haitian asylum seekers also face an uncertain future in Canada, however, because Ottawa's own program granting temporary refuge after the quake has already ended, after being extended twice by the Trudeau government.
Numerous people who've crossed in recent weeks are from Haiti; statistics from the IRB show that in 2016, only 50 per cent of claims from Haitian nationals were accepted.style="text-align: center;"