On Labor Day, 1935 the Florida Keys were hit by a category 5 hurricane with 185 MPH winds. The storm then went up the coast and flooded North Carolina and Maryland.
06 Sep 1935, Page 1 – The Express at Newspapers.com
This came a few weeks after the worst dust storm and most intense rainfall on record.
On May 31, 1935 Woodward Ranch, Texas set the world record with 22 inches of rain in less than three hours.
Colorado got nearly that much rain a few hours earlier.
Extreme Weather: A Guide & Record Book – Christopher C. Burt – Google Books
CO2 was 305 PPM at the time. If we had a repeat of 1935 weather, experts would say they were 100% certain it was due to 400 PPM CO2.