
On standby
Emergency Readiness
Used to describe people or things that can quickly respond in unexpected situations.

The fire department keeps a team on standby for rapid response.
Immediacy Required
Indicates a high level of urgency and the need for a quick reaction when summoned.

During the storm, utility crews were on standby to restore power.
Passive Alertness
Refers to a state of being alert without taking action until it becomes necessary.

The lifeguard is on standby, watching swimmers in case help is needed.
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