"It's overwhelming," Air Force Capt. Antonio Tamayo told the AP. "We need more medicine. We cannot give anti-tetanus vaccine shots because we have none."
U.S. boots on the ground are bringing much needed backup as powerful Osprey helicopters are now ferrying supplies to the hardest hit areas.
"A disaster this magnitude could completely overwhelm any force or any government and what the Osprey can do is to supplements the exiting rotary wing lift that the Philippine Air force already possess," said U.S. Col. John Peck of the 3rd Marine Expeditionary Brigade told ABC News.
Some of the survivors of Typhoon Haiyan arrived at Los Angeles International Airport Monday night, thrilled to be back with family members.
Rita Whatling told ABC News station KABC-TV in Los Angeles that when the storm hit, she thought her life was over and she would never see her daughter again.
"I'm scared. I thought I'm not coming back," Whatling said.
The Associated Press contributed to this report.