The only break much of America can hope for anytime soon from eye-watering dangerous smoke from fire-struck Canada is brief bouts of shirt-soaking sweltering heat and humidity from a southern heat wave that has already proven deadly, forecasters say.

       And then the smoke will likely come back to the Midwest and East.

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       That’s because neither the 235 out-of-control Canadian wildfires nor the stuck weather pattern that’s responsible for this mess of meteorological maladies are showing signs of relenting for the next week or longer, according to meteorologists at the National Oceanic and Atmospheric Administration’s Weather Prediction Center.