A Portland woman has been airlifted to a Boston hospital after suffering severe burns in a fire at her home. Firefighters responded to the home on Burnside Avenue at about noon on Sunday and found the woman already outside. She was the only one at home. She was taken to a city hospital before being flown to Boston. Her name was not immediately made public. Fire Chief Jerome LaMoria says firefighters were hampered because the nearest hydrant was covered by snow. He says the department had additional staff on because of the weekend storm, which helped. The home suffered extensive damage. The cause remains under investigation.