Usage patterns
速やかに〈動詞〉to do something promptly/without delay
If an earthquake occurs, please evacuate promptly.
速やかな〈事〉prompt (response/action/handling of a matter)
The company was required to respond promptly.
〈事〉を速やかに解決するto resolve a matter promptly
The person in charge resolved the problem promptly.
〈事〉を速やかに報告するto report something promptly
If an accident occurs, please report it promptly.