Data have been updated from 2017-19 to 2019-21 three-year average. We also updated the map layers of previous years (2014-16 and 2017-19) as the underlying data are updated and released by CDC National Environmental Public Health Tracking Network in 2022.
New maps and data now available for the Relative Threshold Heat Index Days from the CDC National Environmental Public Health Tracking Network, 2022. ***PREM***
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