PHOENIX (3TV/CBS 5) - Rosa rolled into town with quite the entrance.

“It’s a lot of water!” said Maricopa County meteorologist Daniel Henz.

But how much are we really talking? Henz said 1 inch of rain across 1 square mile generates 17 million gallons of water.

[READ MORE: Rainy day chaos! Flooding & water rescues, sinkholes and kayaks]

“Yeah, it’s a really large number,” said Henz.

So doing the math, the city of Phoenix saw an average of 2 inches of rain dumping down during this event. An average backyard swimming pool holds about 15,000 gallons of water. So this event alone would be able to fill 1.2 million swimming pools!

[RELATED: Rosa dumps record rain on Phoenix area]

Another way to look at it from a consumer side. An average family household uses 300,000 gallons of water a year. This storm could supply 60,000 homes with water for the entire year.

“We’re off to one of the wettest water years on record because of today,” said Henz.

[RELATED: Firefighters rescue drivers stranded in flooded Phoenix wash]

[MORE: Arizona weather]

But it won’t even make a dent in Arizona’s drought.

“You’d need it to happen multiple days, over multiple months to really put a dent into the long-term drought,” said Henz.

[RELATED: Some Phoenix-area schools, community colleges closed due to flooding]

Guess we’ll need Rosa to bring a few more friends to make that happen.

[RELATED: Huge sinkhole shuts down Phoenix intersection]

Copyright 2018 KPHO/KTVK (KPHO Broadcasting Corporation). All rights reserved.



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