BUENA PARK, Calif. - Even as the American economy shows tentative signs of a rebound, the human toll of the recession continues to mount, with millions of Americans remaining out of work, out of savings and nearing the end of their unemployment benefits.

Economists fear that the nascent recovery will leave more people behind than in past recessions, failing to create jobs in sufficient numbers to absorb the record-setting ranks of the long-term unemployed.

Call them the new poor: people long accustomed to the comforts of middle-class life who are now relying on public assistance for the first time in their lives — potentially for years to come.

Yet the social safety net is already showing severe strains. Roughly 2.7 million jobless people will lose their unemployment check before the end of April unless Congress approves the Obama administration’s proposal to extend the payments, according to the Labor Department.

Here in Southern California, Jean Eisen has been without work since she lost her job selling beauty salon equipment more than two years ago. In the several months she has endured with neither a paycheck nor an unemployment check, she has relied on local food banks for her groceries.

She has learned to live without the prescription medications she is supposed to take for high blood pressure and cholesterol. She has become effusively religious — an unexpected turn for this onetime standup comic with X-rated material — finding in Christianity her only form of health insurance.

“I pray for healing,” says Ms. Eisen, 57. “When you’ve got nothing, you’ve got to go with what you know.”

Warm, outgoing and prone to the positive, Ms. Eisen has worked much of her life. Now, she is one of 6.3 million Americans who have been unemployed for six months or longer, the largest number since the government began keeping track in 1948. That is more than double the toll in the next-worst period, in the early 1980s.