* Double-digit growth may not return in emerging Europe
* Premature optimism about recovery dangerous
* Bank balance sheets likely to be hit again
(Updates with Latvia, Ukraine and banks)
By Sylvia Westall
VIENNA, July 24 (Reuters) - Emerging Europe may not return to the high growth rates and record investment levels it enjoyed before the crisis, the head of the European Bank for Reconstruction and Development (EBRD) said on Friday.
EBRD President Thomas Mirow also warned against underestimating the crisis as more pain was yet to come.
"The crisis started in the financial sector, it then affected the real economy. The ensuing feedback to the financial sector will no doubt hit bank balance sheets again," Mirow said in remarks prepared for a lecture in Vienna.
The development bank, set up in 1991 to foster the ex-Communist bloc's transition to a market economy, recently boosted its investment target for 2009 by 30 percent in response to the crisis. Mirow said he expected a further boost shortly.
It has agreed to take a 25 percent stake in Latvia's nationalised bank Parex and sanctioned a 430 million-euro ($611.6 million) loan to Italy's Unicredit which has a big presence in eastern Europe.
"There can be no secret that Latvia is a cause of concern," Mirow told a news conference, adding that the EBRD would back IMF and EU efforts to help the country, which has been battling to secure aid and is tackling problems over budget funding.
Talking on the region in general, Mirow said a steep rise in non-performing loans and possible corporate defaults were a cause for concern, along with fiscal reform challenges, the need for well-functioning money markets and the problem of regional foreign-exchange exposure.
He said the region should now target sustainable and lasting growth in the aftermath of the crisis. "The depth and breadth of the crisis means that we may not see a return to double-digit growth rates, record levels of investment and readily available finance," he said.
SHRINKING ECONOMIES
Central and Eastern Europe's economies are set to shrink by 5 percent this year, and the former Soviet Union by 5.8 percent, as exports to western Europe sink and capital inflows dry up, according to the IMF.
The EBRD expects Romania, Russia, Turkey and Ukraine to suffer severe recessions, with output shrinking between 4-15 percent this year.
Mirow said Ukraine was in a "very serious situation" and that Europe and the United States must watch it carefully because of its size in the region.
He added however that the IMF's work there was positive step and that he was pleased that a solution was being sought to prevent a repeat of the winter gas crisis.
Local banks, bankrolled by their mostly western owners, fuelled the region's economic boom between 2000 and 2008, drawing in cash for countries like Austria.
"Although a systemic banking crisis has been avoided in the region, adequate capitalisation of the banking system remains a prime task," Mirow said. "It will be important to recapitalise banks which have portfolio weaknesses because of the crisis but are otherwise regarded as sound and stable."
Mirow said the EBRD was in close contact with Austrian and other Western European banks "on further projects". He did not mention any specific companies.