Final answer:
A warning or alert is issued to the general public when conditions indicate an imminent or ongoing natural disaster. This notification system includes different levels of alerts such as space weather predictions and environmental disturbance warnings to ensure public safety and preparedness.
Step-by-step explanation:
A warning or alert is issued when the conditions for a natural disaster event are right and it is about to happen or has occurred. There is a system designed to inform the public about such events which includes various levels of notifications depending on how imminent or ongoing the event is. This system can provide space weather predictions, advise of potential environmental disturbances, and in some cases, may lead to the involvement of national leadership or military assistance in response to the disaster.
When specific conditions are met that indicate a natural disaster could occur, an alert is generated to prepare the public and relevant authorities. The issuance of alerts and warnings signifies that an event is likely, imminent, or already happening, prompting preparation and precautionary actions. This reflects the understanding that a natural disaster is a public matter affecting safety, infrastructure, and potentially triggering economic risks.