Across Ontario the National Day of Mourning is being marked in honour of workers killed or injured on the job.

In Chatham-Kent, flags were lowered to half-staff and a ceremonial minute of silence was observed at the Civic Centre.

Mayor Randy Hope said in a statement, “Safe workplace conditions are absolutely essential for the good of individual employees and their families, and for the overall health of our community...Today, we re-commit ourselves to building a strong safety culture that includes prevention and pro-activeness.”

The Windsor and District Labour Council says, "Ontario still lacks adequate legisltaion and enforcement to prevent workplace injuries, illnesses and deaths."

According to the Workplace Safety and Insurance Board, in 2013 there were 102 traumatic fatalities, 181 approved occupational disease claims and 1,130 critical injury claims.

In addition, the board says more than 200,000 workers file occupational injury and disease claims in Ontario each year.

Ontario Premier Kathleen Wynne is taking part in the event by joining in a wreath laying ceremony at the Workplace Safety and Insurance Board offices in Toronto.

Also Tuesday, Toronto's CN Tower will be lit in yellow -- a colour symbolic of hope -- at sunset.