The spill directly impacts only two industries: fisheries and tourism in four states.
The total gross state product in 2005 for Louisiana was US$168 billion, placing it 24th in the nation. Tourism and culture are major players in Louisiana's economy, earning an estimated $5.2 billion per year. Greatest income is derived from the petroleum and gas industries.
Tourism accounts for 3% of GSP. You can expect a similar or smaller figure for the fishing industry. Petroleum and gas will remain the primary source of income for this state. Don't expect the deep sea drilling moratorium to last very long.
The Bureau of Economic Analysis estimates that Mississippi's total state product in 2006 was $84 billion. On August 30, 2007, a report by the United States Census Bureau indicated that Mississippi was the poorest state in the country.
The primary industry has always been agriculture.
Alabama is part of the largest industrial growth corridor in the nation. The state has heavily invested in aerospace, education, health care, and banking, and various heavy industries, including automobile manufacturing, mineral extraction, steel production and fabrication. According to the United States Bureau of Economic Analysis, the 2008 total gross state product was $170 billion
The Gross Domestic Product (GDP) of Florida in 2007 was $734.5 billion. Its GDP is the fourth largest economy in the United States. The major contributors to the state's gross output in 2007 were general services, financial services, trade, transportation and public utilities, manufacturing and construction respectively. 23.2 million tourists visited Florida beaches in 2000, spending $21.9 billion. In 2009, fishing was a $6 billion industry, employing 60,000 jobs for sports and commercial purposes.
For this important state, tourism also accounts for about 3% of income, fisheries less than 1%. Furthermore, the East coast of Florida should experience no or minimal impact from the spill.
That's four states out of 50, one of which if pretty important to the economy of the nation as a whole, two of which are middle of the field. However, all four of these states generate the bulk of their income from industries other than tourism and fishing.
So, yes, it's an environmental disaster, but it's not the economic disaster that you paint. In fact, the whole thing is pretty insignificant when compared to Hurricane Katrina.