The International Monetary Fund cut its global growth forecasts as the euro area's debt crisis intensifies and warned of even slower expansion unless officials in the U.S. and Europe address threats to their economies.

The world economy will grow 3.3 percent this year, the slowest since the 2009 recession, and 3.6 percent next year, the IMF said today, compared with July predictions of 3.5 percent in 2012 and 3.9 percent in 2013. The Washington-based lender now sees “alarmingly high” risks of a steeper slowdown, with a one-in-six chance of growth slipping below 2 percent.

“A key issue is whether the global economy is just hitting another bout of turbulence in what was always expected to be a slow and bumpy recovery or whether the current slowdown has a more lasting component,” the IMF said in its World Economic Outlook report. “The answer depends on whether European and U.S. policy makers deal proactively with their major short-term economic challenges.”