Grid operators warn the US heatwave could send electricity demand near record levels before the Fourth of July holiday.Power grid operators in the United States are warning that a dangerous heatwave could put more strain on an electric grid already under pressure from surging energy consumption.A stretch of extreme heat is expected to intensify across much of the central and eastern parts of the country this week, peaking from Tuesday through Thursday.Recommended Stories list of 3 itemsend of listThat heatwave is likely to continue through one of the busiest travel weekends of the year, as millions of Americans prepare for Fourth of July celebrations on Saturday.Temperatures this week are forecasted to climb above 38 degrees Celsius (100 degrees Fahrenheit) from Boston to Washington, DC, pushing up demand for air conditioning.The heatwave coincides with two major events on the US calendar. Saturday’s holiday marks the 250th anniversary of the US’s independence, and millions are expected to gather for barbecues, parades and fireworks.The extreme temperatures also come as the FIFA World Cup has reached the knockout stage, with many host cities, including New York, Boston, Philadelphia and Washington, expected to feel the heat.Humidity could push the heat index as high as 46 degrees Celsius (114 Fahrenheit) in some places, while overnight temperatures will offer little respite.The US’s largest …
