Smoke from Canadian wildfires is drifting south and making it difficult for Americans to enjoy summer, six members of Congress have said in a letter to Canada's embassy, BBC reported.

"We write to you today on behalf of our constituents who have had to deal with suffocating Canadian wildfire smoke filling the air to begin the summer," they wrote to Ambassador Kirsten Hillman.

It was signed by Tom Tiffany and Glenn Grothman of Wisconsin and Michelle Fischbach, Brad Finstad, Pete Stauber and Tom Emmer of Minnesota. The Canadian embassy told the BBC that Canada takes wildfire prevention "very seriously". 

Two Canadians have died in this year's wildfires and tens of thousands of others have evacuated, according to BBC.