Although firefighters spend only 1 to 5 percent of their time putting out fires, 32 percent of firefighter deaths from heart attacks occur at fire scenes, the study found.

MSN: Firefighters' heart attack risk soars at the scene

Looking at firefighter heart attack deaths nationwide over a decade, the researchers found that the risk of heart attack is highest when firefighters are working at a fire scene with increased odds ranging from 10 to 100 times the normal risk of heart attack.

MSN: Firefighters' heart attack risk soars at the scene

With the exception of the firefighter in Tasmania, however, no deaths have yet been reported.

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