At first, I started to compile a list of hot springs not accessible due to wildfires, but then I realized that almost all of the hot springs in Idaho, especially backcountry (ones you have to backpack to reach) hot springs are blocked by wildfire. My best advise to you; check the Interagency Fire Center Incident page. Don’t just check out the active fires, but call before you go. If you plan on backpacking, the chances are slim that you’ll get to a hot springs. Have a few backup plans handy.