ROME, ITALY / RankWire.AI / – Italy increased its most severe heat warning to include 17 cities on Monday, July 20, after 14 cities were under the highest alert on Sunday. The Italian Ministry of Health issued Level 3 alerts as the country experiences its third significant heatwave of summer 2026. The alerts predominantly affect central and southern Italy, including Rome, Naples, and Palermo. They indicate health risks to the entire population, not just vulnerable groups.
The red alert list on Sunday featured Bari, Campobasso, Civitavecchia, Florence, Frosinone, Genoa, Latina, Naples, and Palermo. Additionally, Perugia, Pescara, Rieti, Rome, and Viterbo formed the 14-city group. On Monday, the bulletin expanded to include Catania, Messina, and Reggio Calabria, bringing the total to 17. No cities were under an orange heat alert on Monday. Ancona, Bolzano, and Cagliari remained at yellow, which signifies a pre-alert stage.
Italy’s heat-health monitoring system covers 27 major cities and provides forecasts for the next 24, 48, and 72 hours. Level 0 indicates no heat risk, while Level 1 signals conditions that could lead to a heatwave. Level 2 alerts warn of dangers for older adults, young children, and those with chronic illnesses. Level 3 is issued when prolonged heat endangers both healthy and vulnerable populations.
Intense heat warnings extend across southern regions
The peak conditions persisted over central and southern Italy and the surrounding islands on Monday. Forecasts predicted Rome and Florence near 36 degrees Celsius, Naples around 34, and Palermo close to 37 degrees. Some areas of Sicily and Sardinia continued to experience temperatures exceeding 40 degrees. Northern regions reported cooler temperatures along with more unstable weather, creating a stark contrast between the northern storms and southern heat.
Italy’s Civil Protection Department issued separate yellow alerts for thunderstorms and rainfall in parts of Emilia-Romagna, Lombardy, Marche, and Veneto. These notices addressed typical weather risks rather than the heat-health alerts. As a result, Italy managed two distinct hazards on Monday: dangerous heat across many central and southern cities, and storm threats in several northern and Adriatic areas. Local authorities maintained ongoing monitoring of both conditions.
Health advisories focus on peak daytime temperatures
Health officials recommended residents and visitors avoid direct sunlight during the hottest hours and reduce strenuous outdoor activities. They also emphasized the importance of drinking water regularly, eating light meals, and maintaining cool indoor environments. Extra caution is advised for older adults, infants, pregnant women, and individuals with heart, lung, or chronic illnesses. Residents are encouraged to check on neighbors or family members living alone who might need assistance during extended heatwaves.
The increase from 14 red alerts on Sunday to 17 on Monday was due to new maximum warnings issued for Catania, Messina, and Reggio Calabria. The other 14 cities remained at Level 3 for a second consecutive day. Italy updates its heat advisories throughout the summer, enabling residents and local agencies to stay informed about city-specific health risks. The latest alerts kept Rome, several regional capitals, and major tourist destinations under Italy’s highest heat warning as the heatwave continued.