(Internet slang, offensive) to have a furious outburst

to light a fire / to set on fire; to ignite; to set fire to / (figuratively) to spark; to ignite (excitement, debate, controversy, etc.)

slash-and-burn agriculture

wildfire

Alternative form of 火に油を注ぐ

the temperature of a kiln for firing various kinds of ceramics

(mythology) furaribi (a fire yōkai)

(Japanese mythology) son of 瓊瓊杵 (Ninigi) and 木花開耶姫 (Ko no Hana no Sakuyabime), younger brother of 火照 (Hoderi), husband of 豊玉姫 (Toyotamabime), father of 鸕鷀草葺不合 (Ugaya Fukiaezu) and grandfather of Emperor Jinmu; he was known to have a conflict with his brother in the myth 海幸山幸 (Umisachi Yamasachi, “Luck of the Sea and Luck of the Mountain”)

to add fuel to the fire

where there's smoke, there's fire