This February 6, 2013 file photo shows Teresa Heinz Kerry (L) and husband, US Secretary of State John Kerry, applauding during introductions at his ceremonial swearing-in event at the US Department of State in Washington, DC. The wife of US Secretary of State John Kerry was on July 7, 2013 rushed to hospital after falling ill, a US source told AFP. Teresa Heinz Kerry "suffered some kind of medical episode" and was taken to a local hospital in Nantucket, a source close to Kerry said. Heinz Kerry, a multilingual philanthropist born to Portuguese parents in colonial-era Mozambique, was undergoing tests and Kerry was by her side, he added.
By Andrea Mitchell, NBC News
Teresa Heinz Kerry, wife of Secretary of State John Kerry, is in critical but stable condition after being taken by ambulance from the couple's Nantucket, Mass. home to a hospital on Sunday afternoon, sources close to the family told NBC News.
A spokesman for Nantucket Cottage Hospital said Heinz Kerry, 74, was admitted to the emergency room around 3:30p.m. but gave no more public information about her condition.
Heinz Kerry, a breast cancer survivor, is the mother of three adult sons from her marriage to the late Pennsylvania Sen. John Heinz who died in a plane crash in 1991.
Sec. Kerry has been in Nantucket since returning from the Middle East on Wednesday.
Heinz Kerry is a longtime activist on environmental causes and leads the Heinz Family Foundation.