Italy: High temperatures forecast to persist across southern regions through at least Aug. 5 /update 2

Forecast models indicate that high temperatures will persist across parts of southern Italy through at least Aug. 5. The current heatwave affecting much of the country is expected to moderate in central and northern regions whilst continuing to impact southern regions over the coming days. Highs in excess of 40 C (104 F) are forecast in the region Aug. 2-4. Officials have issued red high-temperature warnings (the highest level on a three-tier scale) across Sardinia and Sicily regions, orange high-temperature warnings across Basilicata and Puglia regions, and yellow high-temperature warnings across Calabria regions Aug. 2. Red high-temperature warnings are in place for Sicily and ornage high-temperature warnings for Basilicata, Calabria, and Puglia regions Aug. 3. Officials 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.