Long Live (The Elementals of Iona #1) by VB Lacey
 
Isla Belthare lives an ordinary life in her small village of Lockhurt. Since losing both her mother and the man she loved two years ago, all she wants is stability and peace. But her world is forever changed when her family is attacked on a journey away from home and she must travel to the Aataran mountain range to find them.

Across the realm, four ancient beings who control the elements of nature are awakening.

After a civil war that tore the humans apart, the elementals entered a thousand year slumber. Now, they are being summoned to prevent a dark force that is greedy for power and threatening to overturn the balance of nature.

When Isla’s path crosses with one of these elementals, she finds her fate is more entangled with theirs than she had ever imagined. As she risks it all to follow the elementals on their journey to defeat the unknown foe, she discovers that not everything may be as it seems. Isla is torn between protecting her loved ones or following her heart down a dangerous path of power and magic, of truth and lies.

What will they sacrifice to stop the coming storm?