Caribbean ERMA®, an online mapping tool covering Puerto Rico, the U.S. Virgin Islands, and surrounding islands, was developed in conjunction with U.S. Environmental Protection Agency Region 2. The site has been used to visualize environmental response data during a regional oil spill drill, to map small vessel groundings near coral reefs, and to assist in identifying resources affected by the 2009 explosion and fire at the Caribbean Petroleum Corp (CAPECO) oil storage facility in Puerto Ric