Fire Damage

Fire is one of the types of damage in Diablo III. It is red-tinted in appearance.

Fire damage is dealt by a wide variety of character skills and spells, and can be added to skills with runestones. It is also a common modifier found on items. Many fire attacks, such as Meteor or Molten Arrow leave a field of flames on the ground, dealing considerable fire damage over time to anything in the vicinity.

Numerous monsters cast fire spells or add fire to their attacks. Bosses may manifest it with the Molten boss modifier.

Fire damage can be resisted, as well as reduced or absorbed, but not blocked.

Critical hits scored with Fire damage set targets ablaze, dealing additional fire DoT.

Diablo III Damage Types

A wizard burns with fire damage inflicted by runestone-enhanced Mongrels in the Arena.

Blizzard's @Diablo Twitter feed added some clarification about damage types in posts made in early December 2010.[1]

any change in the range of damage types to include holy, shadow, voodoo or anything else to match the classes? —Scyberdragon

Damage types will likely change some but are currently Physical, Fire, Lightning, Cold, Poison, Disease, Arcane, and Holy. —Diablo

Whats the difference between poison and disease damage?—WickedBubba
Disease has a damage debuff (both intake and output), and poison has a health debuff (regen/heal). Subject to change of course.—Diablo

Is there much difference between poison and disease? They’re both internal maladies that hurt over a period of time.—Grug

Fairly significant in their difference, but both countered with a single resistance. Damage/resists aren’t design complete though.—Diablo