(WXIA) -- The Gulf Coast was inundated with rain Tuesday afternoon, with Mobile, Ala., receiving more than 9 inches of rain in the past 20 hours.

A few short miles away in Pensacola, Fla., more than 5 inches of rain fell in less than one hour.

Cars are submerged in both cities, leaving stranded motorists to be rescued from high waters by authorities.

The Escambia County Sheriff's Office says that at least two people have died in submerged cars on Highway 29.

The National Weather Service has issued a Flash Flood Emergency for portions of that region. 11Alive's Allison Chinchar says a Flash Flood Emergency is actually one step above a Flash Flood Warning, and while rare, is issued when a significant amount of rain falls within a very short period of time, leading to catastrophic flooding conditions.

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