It means you are furious, your anger is out of control.
This metaphor compares anger to a fire, therefore the term "hot sparks" shows how strong the anger is.
a feeling of very strong anger
The opposite of anger and strong feelings could be calmness or serenity.
Wrath
Anger is not an adjective. It is a noun (a strong feeling of displeasure) and a verb (to arouse strong feelings of displeasure). Angry is the adjective form.
a feeling of very strong anger
Three strong emotions are love, anger, and joy.
Yes, "anger" is a noun. It refers to a strong feeling of displeasure or hostility.
Yes, ire can mean anger.
Godlike anger.
"His anger is a gale force" is an example of a simile, as it compares his anger to the intensity and power of a strong wind.
Wrath