When your squad reaches Santa Fe Springs, and wait for the fire by your crashed helicopter to subside, leave the map and come back, possibly after completing Woodson's quest to patch the walls. When the doctor and vendor appear at the base this is when the fire should go out allowing passage. There are several badgers in this new area, as well as some loot.
This is when the annoying Adrian Gordon will start following you if you click on him, and he will ask you a bunch of questions concerning who or what you are. I have heard that if you hear him out and let him guess enough times he will eventually concede and say "fuck it, I give up," or something and sit down and leave you alone. However, if you let him follow you out of the base he will just follow your squad around until he gets killed.