When The Levee Breaks by Led Zeppelin

"When the Levee Breaks" is a blues song written and first recorded by husband and wife Kansas Joe McCoy and Memphis Minnie in 1929. The song is in reaction to the upheaval caused by the Great Mississippi Flood of 1927. According to the When The Levee Breaks Songfacts, African-American plantation workers were forced to work on the levee at gunpoint, piling sandbags to save the neighboring towns. Hence the lyrics, "I works on the levee, mama both night and day, I works so hard, to keep the water away." .