A couple of fine resources are available to the public via Esri in an effort to track and keep tabs on the terrible state of wildfires in the western US
View continuously updated information about wildfires and their perimeters from the USGS and other agencies. You can also see live weather warnings and wind information from NOAA, as well as live weather radar from AccuWeather. Get a local perspective on events by turning on geotagged social media from Twitter, YouTube, and Flickr on the Layers tab.
Get a detailed look at 15 active fires throughout California with this story map. As you scroll through the map, you can view fire perimeters and hot spots for each active fire, and get up-to-date statistics about each blaze, including total acreage, percent containment, and damage caused.