As relief efforts continue after twin earthquakes in Venezuela that killed 188 people and injured more than 1,500 others, federal officials are warning people to be cautious when donating to charities. The warning comes as many Venezuelans living in the Philadelphia area anxiously wait for news from loved ones affected by the disaster. Emilio Buitrago said his family lives in La Guaira, one of the cities hit hardest by the earthquakes that struc…