Book2 in the League od Elder series
When Carahil, an Elemental Spirit and newly minted god in the Celestial Arborium, foresees the destruction of an entire world, he's faced with the ultimate question: how far is he willing to go to save it? Unable to rid himself of his vision of death and destruction, he decides to save the planet, but at great peril to all involved. Carahil soon discovers how powerless the gods truly are, and that the greatest hazard of being of the Older Folk is to care too much. Though struggling to achieve a greater good, he might be the cause of a horrific tragedy instead. Hell awaits should he fail.