According to a new study, America will most likely get more killer tornadoes and supercell storms as the world warms up.

The storms will be edged eastward and will strike more frequently in areas such as Alabama, Mississippi, and Tennessee. These storms are said to hit closer to poverty and vulnerable housing than where the storms hit last century.

The storm season will also be starting a month earlier than usual. Supercells are nature’s ultimate storms; supercells have a rotating powerful updraft of wind and can last hours.

Supercell storms in 2011 have caused more than 300 deaths in the Mid-South. The study is using computer simulation to determine what will happen as the weather continues to warm up.