Urgent
Emergency
noun, な adjective, の adjective
Things are tense and we have to hurry! This is quite the urgent emergency!
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
緊急地震速報を携帯で受信した三秒後に、地震が起きました。
Three seconds after receiving an emergency earthquake report on my cellphone, the earthquake occurred.