Have you ever seen the rain -- CCR

Someone told me long ago  There's a calm before the storm
I know, and it's been coming for sometime  When it's over so they say
It'll bring a sunny day  I know, shining down like water
I wanna know, have you ever seen the rain
I wanna know, have you ever seen the rain  Coming down on a sunny day

Yesterday and days before  Sun is cold and rain is hot
I know, been that way for all my time  Till forever on it goes
Fill the circle fast and slow  I know, and I can't stop my wonder
I wanna know, have you ever seen the rain
I wanna know, have you ever seen the rain  Coming down on a sunny day     (sing365)  

Some have speculated that the song's lyrics are referencing the Vietnam War, with the 'rain' being a metaphor for bombs falling from the sky.                                      (wikipedia)   

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                                  Vietnam War - Hue City 1968