'Help': Message seen by a US surveillance aircraft
15 November 2013 Last updated at 14:05 GMT
One week after Typhoon Haiyan struck the Philippines food and supplies are now beginning to reach survivors, but aid agencies say the logistics of distribution are enormous.
The US military has been flying over affected areas to get an indication of the places most in need of vital aid.
The BBC's Rajini Vaidyanathan has been on board a US aircraft during one of its surveillance missions.