After severe weather in eastern Canada and a plane crash in Toronto, Air Canada has released an operation update to customers.

“Yesterday was a difficult day, and we were greatly concerned by the incident involving Delta Air Lines. Our thoughts remain with that flight’s customers and crew,” Craig Landry, Executive Vice President & Chief Operating Officer at Air Canada said in a press release Feb. 18.

“Unfortunately, this incident added to weather events over the past few days that have been extremely challenging for airlines in Eastern Canada. Safety must always be our top priority and sometimes ensuring safe travel requires slowing down and adapting to conditions,” Landry said.

Air Canada cancelled approximately 1,290 flights over six days as a result of the storm and the incident at Toronto Pearson International Airport, they said in the press release.

“We anticipate it may take several more days, depending on the weather, to return to fully normal operations,” Landry said.

Delta connection flight 4819 was involved in a single-aircraft accident at Pearson Airport around 3:30 p.m. on Feb. 17, according to Delta.

The flight was coming from Minnesota and crashed and flipped over during landing.

A total of 21 injured passengers were transported to local hospitals after the incident. As of the morning of Feb. 18, 19 were released, according to Delta.

“Our most pressing priority remains taking care of all customers and Endeavor crew members who were involved,” Delta CEO Ed Bastian said.

“We’ll do everything we can to support them and their families in the days ahead, and I know the hearts, thoughts and prayers of the entire Delta community are with them. We are grateful for all the first responders and medical teams who have been caring for them,” he said.