and law enforcement about a missing child believed to have been abducted. Local or state law enforcement agencies investigating the abduction will provide descriptions of the missing child, suspect or vehicle used by the suspect, and ask the public to notify the requesting agency if they have information on the child's or suspect's whereabouts. Civil danger warning (CDW) – Assigned a higher priority than a Local Area Emergency, this indicates a hazardous event (such as the contamination of local water supply or a military or terrorist attack that is imminent or ongoing) presenting a danger to a significant civilian population, requiring specific protective action (such as evacuation or sheltering in place). Earthquake warning (EQW) – Indicates earthquake activity is ongoing or imminent. Evacuation immediate (EVI) – Warns the public that immediate evacuation for a long-duration emergency event (such as for an approaching tropical cyclone, a wildfire or the release of flammable or explosive gas) has been recommended or ordered by state and/or local law enforcement. Hazardous materials warning (HMW) – Warns the public of the release of non-radioactive hazardous material (such as a flammable gas, toxic chemical, or biological agent) that may necessitate recommendations of evacuation (for an explosion, fire or oil spill hazard) or sheltering in place (for a toxic fume hazard). Law enforcement warning (LEW) – Issued by authorized law enforcement agencies to warn the public of a bomb explosion, riot, or other criminal event (e.g., a jailbreak) that may result in the blockade roads, waterways, or facilities, the evacuation or denial of access to affected areas, and the arrest of violators or suspicious persons. Local area emergency (LAE) – An emergency message that defines an event of insignificant threat to public safety and/or property, which could escalate, contribute to more serious events, or disrupt critical public safety services (such as a disruption in water, electric or natural gas service, snowfall-induced road closures, or a potential terrorism threat). Nuclear power plant warning (NUW) – Warns of a hazardous materials event at a nuclear power plant classified as a Site Area Emergency (a hazardous event confined to the plant site) or General Emergency (an event affecting a less than radius around the plant) under Nuclear Regulatory Commission (NRC) guidelines. Authorized officials may recommend evacuation or medical treatment of exposed persons in nearby areas. Radiological hazard warning (RHW) – Indicates the loss, discovery, theft or release of a radiological hazard.