This updated dataset reports the total number of days in which an extreme heat event was above a specific threshold in the 95th, 98th, and 99th percentile. Data were obtained from the Centers for Disease Control and Prevention (CDC) Environmental Public Health Tracking Network (EPHTN).
High Heat Index Days by County, 2011
Layer displays the percentage of weather observations in 2011 with high heat index values (103F or higher) by county.