Spain: High temperatures forecast to persist over much of the country through at least Aug. 1

Forecast models indicate high temperatures will persist across much of Spain through at least Aug. 1. Maximum temperatures of 34-40 C (93-104 F) are expected across large parts of the country, with isolated higher maximums possible in southern mainland regions.

As of July 29, AEMET has issued orange high-temperature warnings (the middle level on a three-tier scale) across parts of Andalucia, Aragon, Basque Country, Catalonia, and Navarre autonomous communities and Mallorca in the Balearic Islands July 29, as well as yellow warnings across parts of central, northern, northeastern, and southern mainland Spain and the rest of the Balearic Islands. Further orange and yellow high-temperature warnings are in place across parts of mainland Spain and the Balearic Islands July 30-31. Authorities will likely issue new alerts or update/rescind existing advisories as weather conditions change over the coming days.

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.

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 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.