What natural/geographic disaster happened at the same time as the depression?

Tornado outbreak in 1929, the Dust Bowl of 1930 and a deep South Tornado on 1932.

Explanation:

The Rye Cove Tornado (1929) was the deadliest among all outbreaks. It swept form southwest to northwest along the Appalachian mountains. People died, community schools were destroyed and more were affected.

The Dust Bowl (1930) was a period of strong dust storms that caused major agricultural losses, and also severe droughts. This natural disaster forced hundreds of thousands of people to leave their homes.

The Deep South Tornado (1932) struck the South United States on March 21-22. It killed around 17 people.