TORONTO—Public health officials are urging St. Patrick’s Day revellers to follow physical distancing and other anti-pandemic guidelines today. The main concern is that gatherings and celebrations could turn into COVID-19 super-spreader events. Some provinces and cities have put new restrictions in place; others will rely on existing measures. The Irish embassy in Ottawa is holding a virtual event instead of a traditional reception. British Columbia has ordered bars and restaurants to stop serving alcohol at 8 p.m., while pubs in Atlantic Canada will be closed or have limited seating, Niagara Falls will be lit green for 15 minutes on the hour tonight.