The warning usually mentions a specific hazard such as contaminated water supply, active shooting, unexpected weather alert such as causing roads to be extremely dangerous, major accident, or an imminent or in-progress military or terrorist attack.
It may also provide instructions for protective action such as to evacuate, shelter-in-place, boil water or seek medical treatment.
The following day, the Arkansas Emergency Management Agency issued a civil danger warning alerting residents of the closure of McLean Bottom, a levee in Logan County, and its surrounding roads due to forecasted additional flooding.
[4] On August 10, 2021, Adams County Emergency Management in Nebraska issued a shelter in place warning for an active shooter in Juniata.
[5] This article incorporates public domain material from Non-Weather Related Emergency Message Description Guidelines (PDF).