Nelson Rosario referenced this charity as a good way to contribute to relief efforts in Puerto Rico :
"Unidos": A Hurricane Relief Fund for Hurricane Maria Victims in Puerto Rico
http://hispanicfederation.org/media/press_releases/a_hurricane_relief_fund_for_hurricane_maria_victims_in_puerto_rico/
(snip)
A coalition of New York City civic leaders including Mayor Bill DeBlasio, U.S. Congress Members Nydia Velázquez and Adriano Espaillat, and New York City Council Speaker Melissa Mark-Viverito have joined the Hispanic Federation and its partnering community based organizations to launch Unidos (United), a hurricane relief fund to help those impacted by Hurricane Maria in Puerto Rico. The fund will be managed by the Hispanic Federation, a leading Latino nonprofit organization with more than 25 years of experience in providing disaster-relief assistance to Latinos in the United States and Latin America. One hundred percent of the proceeds will help hurricane victims and the recovery efforts through fellow community and civic organizations in Puerto Rico.
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Charity Navigator rates the Hispanic Federation about as high as it gets:
https://www.charitynavigator.org/index.cfm?bay=search.summary&orgid=4997