Google Finance provides daily data on Wheat Futures. In the graph below, I report the 2012 data for the WEAT Fund that is traded on the NYSE.
I apologize for the bad labels on the X-Axis but note that the futures price hit its peak on September 14th 2012. When I Google that date, there are plenty of drought articles such as this one. Since September 14th, this wheat price index has fallen 12%. If world demand for wheat is soaring, how can prices be falling? International trade must be filling the gap.