Oklahoma’s farm operations feel sting of drought. Associated Press

Lawmakers wade into water battle. Las Cruces Sun-News

Pennsylvania officials say Okla. energy firm’s data filled with errors. Associated Press

In midst of a drought, trying to keep cargo moving on the Mississippi. New York Times

CO2 emissions in US drop to 20-year low. Associated Press

Okla. heat, drought allow deadly amoeba to thrive. Associated Press

Saltwater wedge reaches Chalmette; Plaquemines buys N.O. water. New Orleans Times-Picayune

Study: Climate change threatens New Mexico ski season. Santa Fe New Mexican

Drought sends ‘mighty Mississippi’ river levels near record lows. CNN

Arkansas, N. Carolina ask EPA to waive ethanol mandate. Reuters

Contract awarded to build saltwater barrier protecting Mississippi River drinking water. New Orleans Times-Picayune

For oil driller Harold Hamm, Bakken boom brings more billions and a chance to dabble in politics. Washington Post

Chesapeake to cut natural gas production. Oklahoman

Environmental groups sue EPA for stronger dispersant rules. Houston Chronicle

Plaquemines Parish to declare emergency because of potential hazard to drinking water. New Orleans Times-Picayune

Oklahoma wildfires leave 1 dead, dozens homeless. Associated Press

Mexican communities fight mini-dams. Inter Press Service

Fast-moving Oklahoma wildfires force evacuations. New York Times

Los Alamos researchers study plants’ response to climate change. Santa Fe New Mexican

Utilities ask customers to conserve electricity amid Oklahoma heat wave. Oklahoman

Oklahoma City, much of metro area are under mandatory water rationing. Oklahoman.

64 Okla. temperature records fall or tied in July. Associated Press

Drought intensifies and may last through October. Climate Central

USDA expands list of drought-affected counties, announces new relief efforts for farmers. Washington Post

Stubborn 2012 heat wave roasts eight states. Climate Central

BP oil spill dispersants may have hurt Gulf of Mexico food chain, study finds. New Orleans Times-Picayune