08 Jun 2022 | 10:16 AM UTC
US: Heatwave forecast across southwestern regions through at least June 12
High temperatures forecast across much of the southwest US through at least June 12. Transport and power disruptions possible.
Event
Excessive temperatures are expected to build across much of the southwestern US through at least June 12. Temperatures are expected to continue to rise throughout the week, with the peak temperatures likely June 10-11, and could see records set for the time of year over the coming days. The area of extreme temperatures will expand northwards and eastwards, affecting much of California, Nevada, Arizona, Utah, western Colorado, and western New Mexico. Temperatures of 38-43 C (100-110 F) are expected across much of the affected area and some desert areas could see temperatures as high as 46-49 C (115-120 F).
As of early June 8, the National Weather Service has issued excessive heat warnings for parts of southeastern California, southern Nevada, and southern and western Arizona. Heat advisories have been issued for parts of northeastern and southern California and western Nevada. Excessive heat watches have been issued for parts of central California. Officials could update and possibly extend the coverage of weather alerts over the coming days.
The high temperatures may result in increased energy and water demand, as well as increasing the risk of heat-related illnesses such as heat exhaustion and heat stroke. Authorities are advising the general public to avoid prolonged exposure to direct sunlight, wear loose and light clothing, and stay hydrated.
Hazardous Conditions
The extended period of oppressive heat and dry conditions may produce ideal circumstances for wildfire growth throughout the region. Heatwaves also pose a threat to vulnerable groups - such as the elderly, children, pregnant women, and those with respiratory illnesses - due to the increased possibility of heat stroke or heat exhaustion during prolonged exposure to high temperatures. These health risks could also extend to relatively healthy individuals during significant heatwave events.
Transport and Utilities
Very high temperatures may warp rail tracks and force passenger and freight trains to operate at reduced speed. Road surface damage is also possible, and overheated vehicles may worsen traffic problems in urban areas where congestion is already a problem. Commercial trucking disruptions might occur as very high temperatures put more stress on engines, making tire blowouts more common. Major flight disruptions are unlikely, but general aviation disruptions are possible, and some airfreight carriers could reduce cargo loads. High temperatures could lead to an increased demand for electricity, which might trigger localized brownouts or blackouts, exacerbating hazardous conditions when air conditioning is no longer possible.
Advice
Monitor local media for weather updates and related advisories. During heat waves, remain indoors in air conditioning when possible. If outdoor activities are necessary, frequently rest in shaded areas; avoid activity during the hottest times of the day. Stay well hydrated by drinking plenty of fluids. Avoid alcoholic beverages, which are dehydrating - drink bottled water or water that has been boiled. Wear loose-fitting, light-colored clothing. Cotton fabrics are more cooling than synthetics. Promptly seek medical attention if signs of heat exhaustion or heat stroke develop. Charge battery-powered devices in case prolonged electricity outages occur.
