Heat-Related Illness Emergency Department Visits

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Heat can cause acute illness that can sometimes require an emergency department visit (ED visit). ED visit data includes patients that were treated in the ED and then either released or hospitalized for further care. ED visit data include more patients than hospitalization data because most people visit the ED first. ED visits due to heat are sometimes not coded as heat-related, which can mean that the data underestimate heat-related ED visits.

Emergency department visits by year
Emergency department visit rate by year
Emergency department visit rate by region
Emergency department visit rate by month
Emergency department visit rate by age
Emergency department visit rate by age and sex

Number of heat-related illness emergency department visits by year

Summertime heat-related emergency department (ED) visits vary widely from year to year.

Source: Minnesota Hospital Association

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Heat-related illness emergency department visits by year

Rates of summertime heat-related emergency department (ED) visits vary widely from year to year.

Source: Minnesota Hospital Association. The break indicates a change in International Classification of Disease (ICD) coding from ICD-9 to ICD-10 on October 1st, 2015. Rates from 2000-2014 should not be compared to rates from 2015 onward.

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Heat-related illness emergency department visits by Minnesota regions

Urban populations are generally considered at higher risk for heat-related illness due to the urban heat island effect. General trends show that non-metro populations in Minnesota consistently experience higher rates of heat-related emergency department (ED) visits compared to the metro population, until this most recent year. Some populations are more vulnerable to heat-related illness than others. Data on the percentage of vulnerable populations by census tracts throughout Minnesota are available under population vulnerability maps

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Monthly heat-related illness emergency department visits

There are more heat-related illness emergency department (ED) visits in July, corresponding with higher summer temperatures.

Source: Minnesota Hospital Association, 2015-2024

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Heat-related illness emergency department visits by age

This chart shows ED visits by age group. Though the number and rate change year to year, trends show that 15-34 year olds and adults over 65 consistently have higher rates of heat-related emergency department (ED) visits than other age groups.

Tip: Double-click a legend item to display only the selected age group. Double-click again to reset the chart.

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Heat-related illness emergency department visits by sex and age

While people 65 years old and older are considered the most sensitive to heat, this chart indicates that males age 15 to 34 have the highest rate of heat-related illness emergency department (ED) visits. This differs from the hospitalization data where males age 65 years old and older had the highest rate of hospitalization.

Source: Minnesota Hospital Association, 2020-2024

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Emergency department visit rates (County)
Emergency department visit rates compared to MN overall (County)

Heat-related illness emergency department visits by county

The map of heat-related illness map shows higher rates in south central Minnesota. The overall Minnesota rate is 13 visits per 100,000 people.

Source: Minnesota Hospital Association, 2020-2024. Rates based on counts less than or equal to 20 should be interpreted with caution; the rate maybe unstable because it can change dramatically with the addition or subtraction of one case. To protect an individual's privacy, hospitalization counts under 5 are suppressed if the underlying population is less than or equal to 100,000.

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Heat-related illness emergency department visits by county compared to Minnesota overall

This map shows which counties have higher, the same, and lower rates as compared to the overall state rate.The overall Minnesota rate is 13 visits per 100,000 people.

Source: Minnesota Hospital Association, 2020-2024

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