(CNN) — Extreme heat in several states in the western United States will continue through the holiday weekend, and for the third day in a row, Californians are being advised to reduce their electricity use to avoid blackouts.
More than 45 million people are under heat warnings in most of California, Nevada, Washington, Oregon and Idaho and parts of Utah and Arizona.
Forecasts for this Friday point to temperatures above 37.7 °C in cities such as Redding, 40.5 °C; in Fresno, 42.7 °C; and Bakersfield, 41.1 °C, Calif.; Redmond, Oregon, with 39.4 °C; and Yakima, Washington, where 37.7 °C will be reached.
In Nevada, Las Vegas can reach 43.3 °C.
“September begins with scorching temperatures across the western United States, as highs are projected to once again hit daily and even monthly records over Labor Day weekend,” the center said Friday morning. Weather Forecast (WPC).
National Weather “The heat wave will pose a high to very high risk to the general population, especially the elderly and those without adequate air conditioning, due to both the intensity of the high temperature and the duration of the wave.” The service had warned earlier.
The high temperature record for September was set on Thursday with a temperature of 38.8 °C in Salt Lake City and 44.4 °C in Lancaster, California. Dozens of daily records were reached across the region.
Millions of Californians are being urged to reduce their electricity use between 4:00 p.m. and 9:00 p.m. this Friday.
The California Independent System Operator, which manages 80% of the state’s power grid, issued a third Flex Alert During the week, residents were asked to be mindful of their electricity usage.
“Flex Alert covers the time of day when the grid is most stressed by high demand and low solar power,” the operator explained.
The operator has also asked residents to pre-cool their homes before 4 pm and to avoid setting their thermostats to 25.5 degrees Celsius and charging their electric vehicles during cut-off hours.
Los Angeles, Santa Barbara, Orange and Fresno counties have opened cooling centers. The officials have also prepared a list of all the refrigeration centers in the state.
Why is this heat wave different?
High summer temperatures have been the norm in California, but what makes this heat wave particularly dangerous is how long it is expected to last through much of the state. Also, there will be some relief during the night.
“Even after the sun goes down, heat can be a real danger, especially in large cities. Dark sidewalks and buildings are very effective at absorbing heat,” said the Office of Weather Services in Los Angeles.
And because of this, higher temperatures are more common in large cities, making them more susceptible to becoming “urban heat islands,” the agency explained.
The Weather Service defines a heat wave as an unusually hot and humid period of weather that lasts for more than two days.
Extreme heat has killed more people in the United States than any other extreme weather event. According to data recorded by the National Weather Service, heat-related deaths over the past decade have exceeded the number of hurricane deaths by a 15 to 1 ratio.
Climate change imposes conditions that have made extreme weather events more deadly and more common.
In Arizona, where temperatures are expected to reach 100 degrees this weekend, 111 people have died from heat-related complications in Maricopa County this year as of Wednesday, according to a report from the Department of Health. County Public.
The report suggests that 38% of deaths occurred in people aged 50 to 64, and 80% of deaths occurred outside.
– Paradise Afshar, Taylor Romaine and Ala Alasar contributed reporting.