When an Elemental changes into fire form, they lose the blue, green, or purple coloration of normal form and instead take on shades of orange, yellow, or red. Much like normal form, the exact color of fire form varies by individual. In this form, the body is often banded with tiger-like stripes and the hands and feet are typically gray or coal-colored.
The flame-like crest that runs from the head to the tail is actually not made of flame. Instead, the Elemental's normal feathers simply take on a striking, flame-like appearance.
In this form, an Elemental can generate a spark by snapping his/her fingers. He/she can use this spark to start a fire if the conditions are right and can control the movement of the resulting flame. Elementals can control any type of fire, even ones that they do not start. When working together, chains of Elementals can control even large infernos.
Part of a fire Elemental's control is the ability to shrink and snuff out an existing flame by bringing it to an area where it has no fuel to keep burning. This can be useful to prevent property damage or to quench a fire that is becoming difficult to control.
As with any fire starter, the spark of an Elemental is most effective in dry kindling or other flammable materials. Fires are nearly impossible to start in damp environments or outside during a downpour. Elementals are taught to be wary, since flames are somewhat unpredictable by nature and can often grow too large for a single individual (or even a group) to control. An Elemental cannot sustain a fire on his/her own; the fire must have fuel and oxygen in order to keep burning. Elementals in fire form do not have control over very hot/molten substances such as lava, but they do have control over any ensuing flames.
Although Elementals in fire form do gain some level of protection from heat, they are not immune to fire and therefore must take the same care as any other creature not to be overtaken by it.
Elementals most often use fire form not to start fires, but to bring existing flames under control. Large Elemental communities have been known to prevent the spread of forest fires and occasionally even conquer them by surrounding them and burning them out of fuel.
Water and air forms are often used in conjunction with fire form. Elementals in air form can create wind to direct the fire toward or away from a target, and water form Elementals can supply H2O to douse a fire with in an emergency.
Fire form is used in the day to day life of Elemental communities as well. It is used to start and sustain campfires, and also to play a popular Elemental sport called "fire ball."