The order closes non-essential businesses and child-care centres until May 12.
Premier Doug Ford says Ontario’s schools will not re-open on May 4.
All business except those deemed essential have been shut down.
The province will allow curbside pick up and delivery of cannabis.
All industrial construction except for essential projects, such as hospitals, has been halted.
All bars and restaurants, except for takeout and delivery, have been closed.
Also closed are recreational facilities, public libraries, private schools, licensed child-care centres, movie theatres and concert venues.
Any public events of more than five people, including parades, events and services at places of worship, are prohibited, and provincial parks are closed.
The City of Toronto has also closed playgrounds, sports fields, off-leash dog parks, skateboard parks and picnic areas. Parking lots attached to parks are closed.
The province says it will also quadruple COVID-19 testing capacity to 16,000 by May 6.
On April 17, the province expanded eligibility for free emergency child care to include workers in developmental services, victim services, violence against women services, children’s aid societies, probation and parole officers and staff in homeless shelters. The program was initially set up for health-care workers, first responders and correctional officers.