It's often the grandparents who step up when a parent dies or is unable to take care of a child for other reasons, such as incarceration, abuse or mental illness. In 2011, there were at least 2.7 million grandparents raising a grandchild in the United States. But the sudden shift in responsibility can be incredibly stressful. Grandparents may be living on fixed incomes, and the additional dependents can cause costs to soar. There's also an emotional adjustment when an empty nest is no longer empty. When that call comes ... your whole life changes," Sylvie de Toledo said. De Toledo started noticing more of her work clients -- children and grandparents -- dealing with similar challenges. "The most common thread was that they all felt alone and isolated," she said. Determined to bring some of these families together, de Toledo began holding a support group for about 10 of them. When attendance began to skyrocket, she started her own nonprofit, Grandparents as Parents, to help more people cope with the process. Today, more than a quarter-century later, there are 20 support groups across Los Angeles, and the nonprofit works with more than 3,000 families a year, providing them with financial assistance, legal advice and emotional support. More than 90% of the caregivers are grandparents, but the nonprofit also assists aunts, uncles, siblings and close friends who have stepped up to care for children when their biological parents can't. In addition to weekly support groups, there are monthly picnics for families and friends as well as opportunities for the families to attend events together, such as the theater, amusement parks and sporting events.