CHICAGO (CBS) — An 83-year-old Chicago woman is the first cold-related death of the season in Cook County.

The Medical Examiner’s Office says a relative found Florence Hawkins unresponsive in her bed on the South Side on Tuesday.

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An autopsy found Hawkins died of cold exposure and that heart disease was a contributing factor.

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The National Weather Service reports that the low temperature on Tuesday was 17 degrees and Monday night’s low was 23 degrees.

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Authorities say there were at least seven cold-related deaths in Cook County during the cold season of 2011-2012 with the first reported on Dec. 3, 2011.