Flood alert
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Flood alerts are issued by government weather agencies to alert residents that flood conditions are a possibility for their area.
[edit] Types of flood alerts
A flash flood watch is issued when weather conditions are favorable for very heavy rain and flash flooding. Formerly, flood watches were issued separately from flash flood watches; however, the two were recently merged into a single product.[citation needed] A watch does not mean that flooding is actually occurring, only that conditions have created or will create a significant risk for it. If flooding actually does occur, a flood warning and urgent action should be taken.
A flood warning or flash flood warning is issued when flooding in a certain area is imminent or occurring.
[edit] Flood alerts by country
In Canada, a heavy rainfall warning (which indicates rainfall amounts that could produce flooding are expected) has basically the same meaning as a flood watch.
In the United States, the National Weather Service issues watches and warnings for flooding on a per-county basis. When a flood warning is issued in the United States it means a river or creek is in flood.
In Australia, the Bureau of Meteorology issues a flood watch that covers similar conditions to the United States Flood Watch, however, it is known by slightly different names in some states.
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