 While Dorothy cleans up after the meal , Dorothy 's dog Toto runs out the open kitchen door into a violent snowstorm . She succeeds in retrieving him , but finds herself trapped in the storm . A magical whirlwind made of snow – the work of Glinda , the Good Witch of the South – materializes and transports them to the realm of Oz . Released by the snowstorm , Dorothy smashes through an electric " Oz " sky sign as she descends from the atmosphere , and which falls upon and kills Evermean , the Wicked Witch of the East who rules Munchkinland . As a result , Dorothy frees the Munchkins who populate the playground into which she lands ; they had been transformed by Evermean into graffiti for " tagging " the park walls . 
