OTTAWA -- MPs are hearing dire warnings about the potential impact of American tariffs on Canadian aluminum and steel and a looming threat of tariffs on automobiles.

Representatives of the steel industry, auto parts makers, car dealers and the steelworkers union say U.S. President Donald Trump's tariffs could send Canada spiralling into a recession.

The House of Commons trade committee is holding a special meeting to hear about the broad economic pain the tariffs could bring.

The MPs are being told that Canada has to fight back with its own retaliatory levies, which are scheduled to go into effect next week.

Steel company CEO Sean Donnelly says Canada finds itself in unprecedented times that demand unprecedented reactions.

Ken Neumann, Canadian director of the United Steelworkers, says Canada's tariffs should have gone into effect the same day as the American levies.