Empire District Electric (EDE) FWP Free writing prospectus

Issuer Free Writing Prospectus

Filed pursuant to Rule 433

Dated December 10, 2007

Relating to

Prospectus Supplement dated December 6, 2007 to

Registration Statement No. 333-129069

During reassembly of the Asbury generator on the night of December 7, 2007, the unit failed inspection.  After investigation and consultation with the contractor and a representative of the manufacturer on December 9, 2007, it was determined that corrective action would be necessary.  This additional work will likely require the unit to remain on outage an additional 60 days.  This extended outage will require us to replace the energy that would have been generated by Asbury during this 60-day period with energy generated at our gas plants or by buying purchased power.  We estimate this will increase our expenses by approximately $8-10 million during that period, which would result in an approximately $4-5.5 million decrease in net income during the same period.  This would also have a corresponding reduction of $4-5.5 million in our retained earnings, which is generally the amount available to pay out dividends on our common stock.  Our retained earnings as of October 31, 2007 (after giving effect to the accrual for the December 15, 2007 dividend) was approximately $15.6 million.  We are exploring alternatives to minimize the short-term impact of these expenses on our retained earnings.  We do not expect this short-term issue to affect our long-term plans of building rate-based infrastructure to serve our customers or our long-term dividend policy or practice.

The issuer has filed a registration statement (including a prospectus) with the SEC for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and other documents the issuer has filed with the SEC for more complete information about the issuer and this offering. You may get these documents for free by visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the issuer, the underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it by calling UBS Securities LLC at 1-888-827-7275.

The prospectus may also be accessed on the SEC website as follows:

http://sec.gov/Archives/edgar/data/32689/000104746907009905/a2181558z424b2.htm

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