The storm hit Puerto Rico six months ago. Some citizens are still without power.
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The group from Chicago delivered supplies and money to those affected by the hurricane.
Emanuel toured several hard-hit areas of the island, including the city of Comerio, where he received a warm welcome.
The mayor and Gutierrez also helped cut the ribbon on a newly rebuilt Walgreen's store in Naranjito.
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On Sunday, several Chicago Public Schools students plan to leave for Puerto Rico to support relief efforts.