Watch: The ‘world’s hottest month’ explained… in 60 seconds By Madeline Halpert

BBC News, New York

Energy providers are warning Americans to be frugal with air-conditioning this weekend, as intense heat and increased demand could lead to blackouts. Nearly 200 million Americans are under "dangerously hot conditions" alerts with temperatures expected to soar past 100F (38C) in several major cities.The country’s biggest power grid declared a level one energy emergency alert.July is expected to be Earth’s hottest month since record keeping began.PJM Interconnection, the company in charge of power supply in 13 states and Washington DC, warned that "extreme heat […]

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