Per this article:
https://www.gohawaii.com/experiences/sightseeing/Volcanoes
There are three active volcanoes in Hawaii. Two on the big island that I mentioned and one underwater. Per this article:
https://www.hawaii-guide.com/kauai/articles/kauai_faq
Kauai is the oldest of the Hawaiian islands and has no active volcanoes. The article in this thread says that she is on Kauai.