Climate Central: The relentless heat that has plagued the western half of the country this summer has ratcheted up California's terrible drought once again, bringing it to record levels. More than half of the state is in "exceptional' drought, the highest category recognized by the U.S. Drought Monitor, which released its latest update on Thursday.
The progression of the drought in California through the spring and summer of 2014, as the two highest categories, extreme and exceptional drought, grew.
"The heat...