"The heat is coming from that," she said, gesturing at a literal Ultra Hole jammed behind the boiler. There was heat boiling from it. "It's connected to an open volcano! Smell that peanut butter? We've been tracking its source for quite a while now, and I was here checking it out when I found this boiler ready to blow!"

Emily handed Shay and Kaiba some tools as Entrapta continued to work, moving over to let them in. "Give me a hand with this plating! If we're not careful, the whole springs will blow up, and this entire area with it! Lava will flow from the volcano into this area and it'll cause devastation! I'm a scientist, but I've seen this kind of cataclysmic damage before back home on Etheria. Believe me: you don't want to mess with portals we can't close by force. So help me cool this boiler down before it triggers a eruption!"