Category 6: Day of Destruction is a 2004 four-hour television miniseries that was broadcast in the United States on CBS in two parts, with the first part aired on November 14 and the second on November 17. It was later released to DVD on February 15, 2005. The miniseries focuses primarily on the city of Chicago as three unusual storm systems approach from the west, north and south and combine over the city to form a massive hurricane. At the same time a hacker-induced power outage cuts communications leaving a journalist and power officials scrambling to find the cause.

The miniseries was a success for CBS in terms of ratings, as it was the highest-rated movie for the channel in two years, and it earned the highest ratings during the November sweeps week with 19.4 million viewers watching the first part. Critics were less favorable towards the film, with most panning the film for its dialog, implausible science, and poor acting. Some reviewers did praise the film's high-budget special effects and felt the film had at least some "charm." In November 2005 a four-hour sequel, Category 7: The End of the World, aired in the same two-part format.