Reuters: Rising seas, thawing permafrost and longer wildfires caused by warmer global temperatures threaten US military bases and will change the way the US armed services defend the country, President Obama is set to say on Wednesday.

In his commencement address at the United States Coast Guard academy in New London, Connecticut, the White House said Obama will underscore the risks to national security posed by climate change, one of his top priorities for action in his remaining 19 months in office.