“Black Sunday” occurs in April, the worst black blizzard yet. Relief continues with cattle-buying program and soil conservation measures.

Most severe drought that ever hit the US occurs; 100-200 million acres of farmland has been lost to dust storms and drought.

Los Angeles police patrol borders of CA and nearby states to keep out “undesirable” migrants. Soil Conservation Service is begun.

FDR’s Shelterbelt Project begins.

Drought began causing loss of topsoil in dust storms.

Number of dust storms increase to 38 in the southern plains.

FDR takes office and begins emergency aid to farmers.

Drought continues; soil conservation and tree planting reduce significantly the loss of soil.

Rainfall ends the drought. WWII begins in Europe pulling the US out of the Great Depression.