emergency-alert Emergency Alert Type of emergency event being reported Level of urgency indicating how soon action is needed Indicates the severity of the emergency situation Certainty level of the reported event's occurrence Date and time when the alert becomes effective Expected starting time of the emergency event Time when the emergency alert expires Name of the entity issuing the alert Brief headline summarizing the emergency alert Detailed explanation of the emergency situation Guidance or instructions for those affected by the alert Contact details for more information about the alert Origin or source from which the alert information is derived Supplementary notes providing additional context Description of the geographical area affected by the alert