15 Jul 2022 | 07:52 AM UTC
UK: Heatwave forecast over southern and central regions through at least July 19.
Heatwave forecast over southern and central UK through at least July 19. Transport and power disruptions possible. Health concerns likely.
Event
Forecast models indicate that a heatwave will develop over southern and central UK through at least July 19. Forecast models indicate that the temperatures will rise from July 17 and peak July 18 or July 19 before declining from July 20. As of early July 15, Met Office UK has issued amber (middle level on a three-tier scale) extreme heat warnings across eastern Wales and most of England July 17-19. Temperatures of around 32 C (90 F) are forecast across the warning area, with higher temperatures of more than 35 C (95 F) likely in southern, central, and eastern England. A Level 3 (on a four-tier scale) UK Health Security Agency Heat Health Alert is also in place July 16-19. Officials could upgrade or expand the alerts over the coming days.
Avanti West Coast has warned that train services between London Euston and Scotland may be canceled at short notice July 16-17 while amended timetables and extended journey times are likely July 18-19 due to extreme weather conditions. The Great Central Railway in Leicestershire canceled services July 19 due to the high temperature forecast. Authorities may impose blanket speed restrictions for rail services across the affected area if temperatures exceed 35 C (95 F); rail disruptions are likely.
Hazardous Conditions
The extended period of oppressive heat and dry conditions may produce ideal circumstances for additional 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. In addition to significantly impacting athletes and those who work outdoors, high temperatures can cause problems for people using mass transit. The lack of air conditioning and cramped vehicles during rush hour may lead to some passengers being hospitalized for dehydration.
Transport and Utilities
Very high temperatures may warp rail tracks and force passenger and freight trains to operate at reduced speeds. 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 at regional airports, 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 heatwaves, 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 water that is bottled or 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.
