This updated dataset reports the total number of days in which an extreme heat event was above the 98th percentile between 2017-2019 at the county level. Data were obtained from the Centers for Disease Control and Prevention (CDC) Environmental Public Health Tracking Network (EPHTN).
Maximum Temperature – Average Days Above 98th Percentile
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).
Maximum Temperature – Average Days Above 95th Percentile
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).
Heat Index – Average Days Above 99th Percentile
This updated dataset reports the total number of days in which an extreme heat event was above the 99th percentile between 2017-2019 at the county level. Data were obtained from the Centers for Disease Control and Prevention (CDC) Environmental Public Health Tracking Network (EPHTN).
Heat Index – Average Days Above 95th Percentile
This updated dataset reports the total number of days in which an extreme heat event was above the 95th percentile between 2014-2016 at the county level. Data were obtained from the Centers for Disease Control and Prevention (CDC) Environmental Public Health Tracking Network (EPHTN).
Maximum Temperature – Average Days Above 99th Percentile
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).
Heat Index – Average Days Above 98th Percentile
This updated dataset reports the total number of days in which an extreme heat event was above the 98th percentile between 2014-2016 at the county level. Data were obtained from the Centers for Disease Control and Prevention (CDC) Environmental Public Health Tracking Network (EPHTN).
Drought Intensity, U.S. Drought Monitor
This layer displays areas that experienced dry or drought conditions in the last seven days. Data are retrieved as shapefiles from the U.S. Drought Monitor and are updated on a weekly basis. The affected areas are represented by polygons, which are classified according to drought intensity. Using quantitative and objective indicators, as well as local condition and impact reports, the U.S. Drought Monitor defines each drought intensity level as follows:
D0 – Abnormally Dry
D1 – Moderate Drought
D2 – Severe Drought
D3 – Extreme Drought
D4 – Exceptional Drought.
For more information about the data, please see the U.S. Drought Monitor Data Classification web page.
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.
EPA Climate Change Indicators – Change in Extreme Temperatures
This indicator displays changes in the number of days with unusually (>95th percentile) cold temperatures in the contiguous 48 United States. Indicator data are acquired from the EPA’s Climate Change Indicators in the United States, Fourth Edition, published in 2016.