"If I had a rain prayer or a rain dance I could do, I would do," says US official

WASHINGTON/CHICAGO, July 18 (Reuters) - Oppressive heat and a worsening drought in the U.S. Midwest pushed grain prices near or past records on Wednesday as crops wilted, cities baked and concerns grew about food and fuel price inflation in the world's top food exporter.

Soybean prices at the Chicago Board of Trade set a record high and corn closed near a record as millions of acres of crops seared in triple-digit heat in the Corn Belt. Corn fields have been plowed up in many locations for lack of rain. Now soybeans, which develop later than corn, are in the bull's eye.

"I get on my knees every day and I'm saying an extra prayer right now," U.S. Agriculture Secretary Tom Vilsack told reporters after briefing President Barack Obama. "If I had a rain prayer or a rain dance I could do, I would do it."

"Part of the problem we're facing is that weather conditions were so good at the beginning of the season that farmers got in the field early, and as a result this drought comes at a very difficult and painful time in their ability to have their crops have good yield," Vilsack said.

Drought conditions now extend over more than 60 percent of the lower 48 states, the government said. The Department of Agriculture on Wednesday extended drought aid to an additional 39 counties designated as primary natural disaster areas, bringing such aid to a total of 1,297 counties across 29 states.