。
She lost her temper and started shouting.
Literal
She [topic-は] blazingly became [and-て] shouted.
Same かんかん mimetic, but here paired with なる ('become') in te-form, then linked to the next action 叫ぶ ('shout'). The pattern かんかんになる ('become furious') turns the mimetic into a state someone enters into; the te-form chain hands off into the shout that follows. This whole construction, mimetic + に + なる, is highly productive: ぺこぺこになる ('get really hungry'), ふらふらになる ('get woozy'), くたくたになる ('get exhausted').