Nico panicked more, unsure what to do and it was no help that he never had experience calming a person,and a fire mage was 10 times worse. Rather than calming him, Nico placed his hand on Maddox's shoulder, using his powers to inflict pain on Maddox as an attempt to snap him out of his grief, though it didn't last long until his hands began to burn. He quickly pulled his hand away after a few seconds and saw it didn't help whatsoever. "Lilith! Your water!" He yelled.
(Oh goodness, I'm not sure how Nico will feel. He's uncomfortable speaking to other human beings as it is so I think you can imagine how stressed out he is right now in this situation. This is the most panic he has ever shown. Also, notice how terrible he is at calming people?? Lol)