With the impressive heat our region has experienced over the past several weeks, numerous Heat Advisory and Excessive Heat Warning products have been issued by National Weather Service (NWS) offices. Some confusion has been noted when heat advisories/warnings are issued for certain areas. Based mainly on climatological studies of where high heat index values occur each summer, different offices throughout the region have different criteria for each heat related product. Below you will find a map of all area NWS offices color coded between eastern, central and western geographic divisions. Each division has different criteria for heat products, which are listed below.