Firehawk is Lorraine Reilly, a super-hero with the powers of Firestorm. Henry Hewitt had her kidnapped so he could duplicate the experiment that created Firestorm. This gave her similar abilities without needing to merge with another person as Firestorm does. Lorraine has been romantically involved with Ronnie Raymond, and they have even merged as part of the Firestorm Matrix. Her father is Senator Walter Reilly, and she later follows in his footsteps as a Senator. She has been a member of the Justice League and the Suicide Squad. In The New 52 continuity, a new Firehawk named Theresa was the Firestorm of France.

Firehawk was created by Gerry Conway and Pat Broderick, first appearing in The Fury of Firestorm #1 (1982).