Shadow Guardian by Skye Jordan

When the search for an abducted child leads to a Waco-like siege, Keira O’Shay is blindsided by a man who still holds too much of her heart. Aiding in the boy’s rescue, Luke Ransom reminds her of the warehouse fire that altered her life and the lives of everyone she loves. One that left her firefighting team with paranormal abilities they neither want, nor understand. And when she discovers the boy she came for shares their powers, she realizes the conspiracy surrounding the fire is far deeper than she ever imagined.

Within moments of seeing Keira again, Luke’s powers rise like a kite in high winds, and the wounds she inflicted by choosing the FBI over him rip open. Within hours, it’s clear the boy Keira came for is also coveted by the darkest level of the deep state. Luke realizes he hasn’t gotten over Keira the way he liked to believe and finds himself fighting for both his team and his heart.