A heat wave sweeping the Midwest threatens to dry up grain crops in the final weeks of the growing season, jeopardizing a bumper U.S. harvest that is key to controlling global food inflation.
The temperatures are forecast could reach as high as 115 degrees in parts of the Midwest this week, renewing concerns from the start of the season when drought sent crop conditions to their worst since the late 1980s before they improved significantly with the return of rain .
