It is ArcGIS. Here is their Emergency Operations Center overlay: https://bouldercounty.maps.arcgis.com/apps/webappviewer/index.html?id=13ab214fe2bb4da5a850df0c

It is ArcGIS. Here is their Emergency Operations Center overlay: https://bouldercounty.maps.arcgis.com/apps/webappviewer/index.html?id=13ab214fe2bb4da5a850df0ca0f00fc5 https://bouldercounty.maps.arcgis.com/apps/webappviewer/inde... You get used to refreshing this page during down-slope, windy, red flag days.