In July, exceptional drought across the Lower 48 states hit the highest levels in the history of the U.S. Drought Monitor.

Dried up pond in Oklahoma, July 21, 2011?[Environment News Service]?

An official with the National Drought Mitigation Center at the University of Nebraska-Lincoln says nearly 12 percent of the contiguous United States fell into the "exceptional" classification during the month, peaking at 11.96 percent on July 12.

That level of exceptional drought has never before been seen in the monitor's 12-year history, said Brian Fuchs, UNL assistant geoscientist and climatologist at the National Drought Mitigation Center.

Exceptional drought brings widespread crop and pasture losses, as well as shortages of water in reservoirs, streams and wells, creating water emergencies.

Across Texas, crops are shriveling in the fields and pastures are burning. Many farmers and ranchers will have little or nothing to harvest. As of this afternoon, Dallas has had 31 consecutive days with temperatures of 100 degrees or higher.

In Oklahoma, the drought has destroyed hay fields, forcing livestock producers to seek hay from less-affected areas and prompting Governor Mary Fallin to issue an executive order allowing truck drivers double their hay loads.

"The weather has made this an extremely tough year for Oklahoma farmers," said Governor Fallin last week, after securing a disaster declaration in 69 Oklahoma counties from the U.S. Department of Agriculture. "This declaration will help those who have been hard hit by drought and other bad conditions to get the assistance they need."

Two weeks ago, 64 percent of the country was drought-free.

Currently, 18 percent of the country is classified as under either extreme or exceptional drought, Fuchs said. Much of it is in the south, particularly Texas, where the entire state is experiencing drought - three-fourths is considered exceptional.

In the next two to three weeks, some drought-affected areas may see some improvement, said Fuchs, but Tropical Storm Don, Texans' hope for rainfall on the weekend was disappointing.