The National Weather Service (NWS) issues various alerts to warn the public about impending weather hazards, with flood notifications being common and potentially dangerous. Understanding the specific language used in these alerts is paramount, as different warnings require different levels of urgency and action. The Areal Flood Warning signals a significant threat that requires timely, informed responses to protect both life and property. Knowing what an Areal Flood Warning means helps individuals act decisively when rising water becomes a reality.
Defining Areal Flood Warnings
An Areal Flood Warning (AFW) is issued by the National Weather Service when flooding is imminent or already occurring over a broad geographical area. This flooding typically develops gradually, arising from prolonged and persistent moderate to heavy rainfall rather than a sudden, intense downpour. The term “areal” refers to the wide geographical scope of the event, which often includes general street flooding, agricultural field inundation, and water entering low-lying basements.
The AFW is distinct from a Flash Flood Warning (FFW), which signals a rapid onset of dangerous flooding posing an immediate threat to life. Flash floods are characterized by fast-moving water in smaller creeks and streams, demanding immediate evacuation to higher ground. Conversely, the Areal Flood Warning indicates a slower, more sustained event where water accumulates over time, though it still represents a serious danger to property and travel. River Flood Warnings are separate alerts reserved specifically for when a major river is expected to exceed its designated flood stage.
Immediate Safety Steps When a Warning is Issued
Upon receiving an Areal Flood Warning, ensure personal safety by moving to the highest safe location available. Quickly seek shelter on higher ground or move to the upper floor of a building. Stay away from any basement or ground-level areas susceptible to rising water. If local authorities order an evacuation, follow it immediately, taking only essential items and following designated routes.
A fundamental rule for all flood events is to never attempt to walk, swim, or drive through floodwaters, a concept summarized by the phrase “Turn Around, Don’t Drown.” Most flood-related fatalities occur when vehicles are swept away; just one foot of moving water can float a car. Floodwaters often conceal hidden dangers like washed-out roads, sharp debris, and downed power lines, which make walking through them extremely hazardous. Additionally, secure any pets and gather necessary documents, like medical records and insurance cards, placing them in waterproof containers for quick access.
Managing the Threat and Monitoring Updates
Once initial safety measures are taken, managing the ongoing threat involves continuous monitoring and preparedness for worsening conditions. Official updates from the National Weather Service, local emergency management websites, and NOAA Weather Radio should be followed closely for changes in the warning status. These sources provide the most accurate, real-time information regarding the flood’s path and duration.
Preparedness includes addressing household utilities if water approaches the structure. If evacuation is necessary or if standing water nears the home, turn off the gas, electricity, and water supplies at the main switches to prevent shock and further damage. After the event passes, do not return home until local officials declare the area safe. Floodwaters are frequently contaminated and can compromise the structural integrity of roads and bridges, making post-flood travel dangerous until assessed.