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The working title of the film was Next of Kin. According to a Hollywood Reporter news item, producer Hal Wallis purchased the rights to Lonnie Coleman's unproduced play Next of Kin in June 1956. Hollywood Reporter news items state that portions of Hot Spell were shot on location in Chatsworth and Pasadena, CA. Hollywood Reporter news items include Toni Sommers, Marjorie Jackson and Katy Conner in the cast, but their appearance in the released film has not been confirmed. Some modern sources mistakenly state that director George Cukor worked on this film.