The Spiraling - Tunsealiorian Saga, #1

Tamora Asken has traded her violent past for a new life as a healer in the remote city of Erengate. Though she is an Iokan, gifted with power over one of the four natural elements, using her gifts could destroy her. In fact, it already has. Marin has lived in Erengate for eighty years, building her life as a baker and a mother. She chose love over reputation years ago, and she hasn't regretted it for a moment. Racynth is a Sentinel, a peacekeeper of the Coalition, newly arrived in Erengate.
What he finds waiting for him threatens to change his life forever. When the city is thrown into chaos and the violent whim's of the city's lord, Tamora, Marin, and Racynth must step into the spotlight to protect that which they care formost.