I don't believe in global warming as it has been politically pushed over the last 10 years. The migration into Mississippi and Alabama did pick up steam after of the War of 1812...Jackson headed a movement to take the lands from the Southern Indians and replace them with white settlers. But this situation had been brewing since after the War of Independence. It is interesting that the weather changed so on that year and the relation to the population boom in the deep South soon after. The year 1860 was a year of heat and drought, especially in the South, where crop failures caused the South to buy food from the North at inflated prices. That year also saw the outbreak of urban fires in the South that were blamed on anti-slavery terrorist...like Brown. The causes of the high heat wave corresponded with an over active Sun cycle of 1859 that bombarded the earth with the effects of coronal mass ejections. The northern lights could be seen in the deep South...the telegraph communications throughout the country were over loaded with electromagnetic pulses caused by the flares. It was not a happy year in the South.