As soon as possible; as quickly as can be (used to express urgency or a wish for something to happen without delay).
一日も早く体調が回復することを祈っています。
I pray that you recover your health as soon as possible.
事故の原因を一日も早く明らかにしてほしい。
I want the cause of the accident clarified as soon as possible.
市は被災者に対する支援を一日も早く開始した。
The city started support for the disaster victims without delay.