PHOENIX (3TV/CBS 5) -- Do you ever wonder why rain smells the way it does?

Ever notice that sort of musky, earthy smell during monsoon?

It's a sign that we may be getting a break from the dry heat that's almost nostalgic.

There’s a reason for the smell.

[WATCH: Thanks this plant for the wet smell when it rains in AZ]

In Arizona, we have the Creosote bush to thank for that musky, wet desert smell.

Brian Harris, a landscape designer from Dig it Up Gardens in Phoenix, says some plants secrete oils during dry periods.

[RELATED: High-intensity rainfall leads to flash flooding in central AZ]

Come monsoon, the oils are released into the air.

The Creosote is like our regions very own air freshener.

"It smells like that because it has volatile compounds -- over hundreds of them in the leaves," said Harris. "And when the rain hits them, it releases that and it smells like rain."

[RADAR: Monsoon activity near Phoenix area]

Growing strong, The Creosote bush can live up to 200 years.

"I put a clipping [of Creosote bush] in my shower so every morning I smell that aroma," said Harris.

It also possesses medicinal qualities.

"It's a general pain-reliever anti-microbial," said Harris. "So, it helps fight bacterial infections, and you can also make a tea out of it."

So, when you think rain, thank the Creosote.

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