Electricity has returned to Spain and Portugal, but the cause of Monday's widespread blackout remains a mystery.

Countries at United Nations-led climate talks in Dubai moved closer to reaching a final deal on Monday, but critics condemned a draft agreement as a watered-down document that won't stop dangerous climate change.

As Spain swelters in its first official heat wave of the year, the government has announced a new department to investigate and alleviate the effects of extreme temperatures on human health.

Spain is building on its reputation in renewable energy to position itself as Europe’s future leader in green hydrogen.

A heat wave broiling Europe spilled northward to Britain and fueled ferocious wildfires in Spain and France.

Spain and Portugal have signed off on a temporary cap on natural gas prices, in a coordinated move described by Portugal’s environment minister as an “unprecedented” bid to temper soaring energy prices and inflation.

Spain has sent another member of its government to Algeria to seek guarantees that its supply of natural gas won't be impacted when Algeria closes its pipeline through Morocco on Sunday.

Spain’s Socialist-led coalition government is slashing energy taxes and imposing a temporary windfall tax on the gains of energy companies in an attempt to drive down household electricity bills, which have surged to record highs and triggered an outcry.