"We're on the brink of a fall that could be much worse than the spring,"he said.
COVID-19 cases have spiked in recent days,with an average of 1123 new cases reported daily over the past week,compared with a daily average of 380 cases in mid-August.
"We have the power to get this second wave under control. I know we can do it,because we've already done it once before,"Trudeau added.
Canadians are now more worried about COVID-19 than they have been since April,an Abacus Data poll showed.
Earlier,the government made the commitments in the so-called Speech from the Throne,which lays out its agenda for the next parliamentary session,and promised to recover more than a million jobs lost during the crisis.
Total infections reached 147,753,while 9243 people have died,according to the latest government data.