South America: High temperatures forecast to continue over parts of eastern Argentina, far southern Brazil, and western Uruguay through at least March 13 /update 2

Event

High temperatures are likely to persist across parts of eastern Argentina, far southern Brazil, and western Uruguay through at least March 13. Temperatures of up to around 39 C (102 F) are possible across parts of the affected area over the coming days.

As of early March 10, Argentina's National Meteorological Service (SMN) has issued the following high-temperature warnings across the country;

• Red high-temperature warnings (the highest level on a three-tier scale): The city of Buenos Aires and parts of northeastern Buenos Aires Province.

• Orange high-temperature warnings: Parts of northeastern Buenos Aires and central, northwestern, and western Entre Rios provinces.

• Yellow high-temperature warnings: Across Corrientes and Santa Fe provinces and all areas of Entre Rios Province not under orange warnings, as well as parts of northern, north-central, and eastern Buenos Aires, central, northern, and northeastern Cordoba, central and southern Misiones, and central and southeastern Santiago del Estero provinces.

Brazil's National Institute of Meteorology (INMET) has issued an orange heatwave alert (the middle level on a three-tier scale) for western parts of Rio Grande do Sul State through March 13.

The Uruguayan Institute of Meteorology (INUMET) has issued a heatwave warning across western parts of the country through March 13. Affected departments include Artigas, western Durazno, Flores, Paysandu, Rio Negro, Salto, Soriano, and western Tacuarembo,

Officials could upgrade or expand the alerts over the coming days as conditions change.

Hazardous Conditions
The extended period of oppressive heat and dry conditions may produce ideal circumstances for wildfire growth throughout the region. Heatwaves also threaten 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' hospitalization.

Transport and Utilities
Very high temperatures may damage road surfaces, 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 vehicles, 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 bottled or boiled water. 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 the case of prolonged electricity outages.

Resources

Argentina National Meteorological Service (SMN)
Brazil National Institute of Meteorology (INMET)
Uruguayan Institute of Meteorology (INUMET)