Heat-Related Fatalities in the U.S. Far Exceed Official Counts
Recent research reveals a staggering discrepancy in the reported number of heat-related deaths in the United States, particularly in North Carolina. A collaboration between NPR and Boston University has uncovered that the actual fatalities caused by excessive heat are significantly underreported by the U.S. Centers for Disease Control and Prevention (CDC).
An investigative model developed using climate data suggests that North Carolina experiences approximately 330 heat-related deaths annually. This figure starkly contrasts the CDC’s official average of 19 deaths per year. The model created by NPR and Boston University researchers takes into account maximum daily temperatures averaged weekly to estimate the death toll linked to heat exposure.
The methodology employed by the CDC in counting heat-related deaths relies on medical professionals explicitly mentioning heat as a cause on death certificates. This approach appears to underestimate the true impact, as the NPR model similarly predicts much higher death figures in other Southeastern states such as South Carolina, Georgia, and Tennessee.
Delving deeper, the research also provides county-level insights. In North Carolina’s Mecklenburg County, the model reports an average of 24 heat-related deaths annually, while Wake County sees around 20 such fatalities.
North Carolina, like other states, follows the International Classification of Diseases to determine causes of death. Although updated codes were released by the World Health Organization in 2019, the U.S. continues to use the 10th revision from 1999. There are specific codes for heat-related deaths, but they depend on whether heat is noted as a contributing factor in the death investigation.
In contrast, some regions have revised their protocols to ensure more accurate reporting of heat-related fatalities. For instance, certain counties record room temperatures at the time of death and inquire about the deceased’s access to air-conditioning and ability to pay utility bills. As a result, the CDC’s figures can sometimes exceed the model’s estimates, as seen in Maricopa County, Arizona.
The findings indicate a widespread underreporting of heat-related deaths across the country, complicating efforts to assess trends accurately. As global temperatures continue to rise, states are confronting more dangerous heat days and increased humidity, both of which challenge the human body’s ability to maintain a stable internal temperature.
