"Lawmakers are set to grill the nation's top pipeline regulator on Tuesday, as a Houston company works to clean up oil spills in California and Illinois that have highlighted safety concerns."

"Forecasters say Tropical Storm Dolores is strengthening out in the Pacific off Mexico's southwest coast and could become a hurricane on Monday."

"'Extreme.' 'Unprecedented.' 'Historic.' Those are just a few of the words being used to describe the start of this year's fire season in North America."

"A new study shows more Americans will suffer the consequences of extreme heat."

"Wildfires are burning in several Spanish provinces, forcing evacuations, and EU authorities say there is an extreme risk of further blazes breaking out in the country as a heatwave shows no signs of abating."

"As she knocked on the federal government's door for aid in the wake of a damaging earthquake in 2011, Oklahoma Gov. Mary Fallin (R) avoided talking about one aspect of the earthquake -- its cause."

"In another setback for Shell Oil’s summer Arctic drilling plans, a ship headed for the Shell prospect in the Chukchi Sea off northwest Alaska was forced to return to Dutch Harbor Friday after a hole was discovered in its hull."

"The Canadian military has been called in to help fight wildfires in the Western province of Saskatchewan, where 112 active fires have forced the evacuation of more than 13,000 people and threatened several remote towns on Monday."

"The tiny federal agency that has urged big reforms in how California regulates oil refineries is in disarray."

"The Western Canadian province of Saskatchewan said on Sunday it was evacuating an additional 8,000 people from the far north of the province, as wildfires continue to spread and threaten homes."