Aura Against Flame

You call on the peaceful waters of Eldath to surround you with a humid blue mist in a 20-foot emanation that moves with you but does not impede sight. Whenever a creature within range takes fire damage, the amount is reduced by 5 points. In addition, torches, campfires, hearth fires, lanterns, and other small fires within range are extinguished automatically at the start of your turn, while larger fires such as bonfires, forges, or burning structures are reduced in intensity, at the DM's discretion.

Using a Higher-Level Spell Slot. Fire damage is reduced by an additional 5 points for each spell slot level above 2nd.

Adapted from Magic of Faerûn (3e)