緊急の時は

in case of emergency

→ 緊急
phrase Rare #39,475
in case of emergency Used to introduce instructions or advice about what to do when an emergency occurs. は marks the situation as the topic.
JA: 緊急の時はこの番号に電話してください。
EN: In case of emergency, please call this number.

緊急の時は私の代理人に連絡をとってください

In case of emergency, please contact my representative.

緊急の時は私に連絡すればいいからね

If it’s an emergency, just contact me, okay?

緊急の時は警察電話しなさい

Call the police in an emergency.

緊急の時はこのボタンを押しなさい

Press this button in case of emergency.