Webthe national weather service has issued a flash flood warning until 10 p. m. For parts of l. a. County, including malibu, santa monica, west hollywood, glendale, and topanga. Weba flash flood warning is issued when a flash flood is coming or in progress. Flash floods are sudden and violent floods that can start within minutes. Another explanation is that cats and dogs may be a corruption of the greek word katadoupoi , referring to the waterfalls. Weba “flash flood warning” means a flash flood is imminent or already occurring, and you should immediately move to higher ground if you’re outside or in a basement. Webevacuation warnings and orders were issued for parts of ventura and los angeles counties ahead of a powerful winter storm that will bring widespread rain and. Weba flash flood emergency is a rare alert issued by the national weather service that should not only grab your attention, but also serve as a signal that you're. Webheavy rain falling across montgomery county has prompted a flash flood warning for the area until 7:30 p. m. Up to two inches of rain have already fallen across.