The National Weather Service issues Flood Watches and Warnings. Here's how to know the difference:
Flood Watch = Be prepared; a flood watch is issued when conditions are favorable for flooding.
Flood Advisory = Be aware; a flood advisory is issued when a specific weather event is forecasted and may cause significant inconvenience or, if not careful, could threaten life or property.
Flood Warning = Take action; a flood warning is issued when hazardous weather is imminent or occurring.
Flash Flood Warning = Take action; a flash flood warning is issued when a flash flood – a sudden, violent flood – is imminent or occurring. Move to high ground immediately.