WASHINGTON: The federal deficit has topped $1 trillion for the first time ever and could grow to nearly $2 trillion by this fall, intensifying fears about higher interest rates, inflation and the strength of the dollar.

The deficit has been widened by the huge sum the government has spent to ease the recession, combined with a sharp decline in tax revenues. The cost of wars in Iraq and Afghanistan also is a major factor.

The US Treasury seal is seen at the Treasury Building in Washington, DC. [Agencies]

The soaring deficit is making Chinese and other foreign buyers of US debt nervous, which could make them reluctant lenders down the road. It could also force the Treasury Department to pay higher interest rates to make US debt attractive longer-term.

"These are mind-boggling numbers," said Sung Won Sohn, an economist at the Smith School of Business at California State University. "Our foreign investors from China and elsewhere are starting to have concerns about not only the value of the dollar but how safe their investments will be in the long run."

The Treasury Department said Monday that the deficit in June totaled $94.3 billion, pushing the total since the budget year started in October to $1.09 trillion. The administration forecasts that the deficit for the entire year will hit $1.84 trillion in October.

Government spending is on the rise to address the worst financial crisis since the Great Depression and an unemployment rate that has climbed to 9.5 percent.

Congress already approved a $700 billion financial bailout for banks, automakers and other sectors, and a $787 billion economic stimulus package to try to jump-start a recovery. Outlays through the first nine months of this budget year total $2.67 trillion, up 20.5 percent from the same period a year ago.

There is growing talk among some Obama administration officials that a second round of stimulus may eventually be necessary.

President Barack Obama and Treasury Secretary Timothy Geithner have said the US is committed to bringing down the deficits once the economy and financial sector recover. The Obama administration has set a goal of cutting the deficit in half by the end of his first term in office.

In the meantime, the US debt now stands at $11.5 trillion. Interest payments on the debt cost $452 billion last year -- the largest federal spending category after Medicare-Medicaid, Social Security and defense.

The overall debt is now slightly more than 80 percent of the annual output of the entire US economy, as measured by the gross domestic product. During World War II, it briefly rose to 120 percent of GDP.