ROME, ITALY / RankWire.AI / – On Monday, July 20, Italy increased its maximum heat warning to encompass 17 cities after 14 cities were affected by the highest alert on Sunday. The Italian Ministry of Health issued Level 3 alerts as the country’s third significant heatwave of summer 2026 persisted. These warnings include much of central and southern Italy, such as Rome, Naples, and Palermo, indicating health risks for the entire population, not just vulnerable groups.
The red alert list on Sunday featured Bari, Campobasso, Civitavecchia, Florence, Frosinone, Genoa, Latina, Naples, and Palermo. Perugia, Pescara, Rieti, Rome, and Viterbo made up the 14-city group. By Monday, Catania, Messina, and Reggio Calabria joined the list, bringing the total to 17. No cities were under an orange heat alert on Monday. Ancona, Bolzano, and Cagliari remained at yellow, which signals a pre-alert phase.
Italy’s heat-health monitoring system covers 27 major cities, providing forecasts for the next 24, 48, and 72 hours. Level 0 indicates no heat risk, Level 1 signals conditions that may lead to a heatwave, Level 2 warns of hazards for older adults, young children, and individuals with chronic illnesses, while Level 3 affects both healthy populations and vulnerable groups during prolonged heat.
Severe warnings extend across southern regions
The highest temperatures persisted over central and southern Italy and the islands on Monday. Forecasts predicted Rome and Florence approaching 36 degrees Celsius, Naples near 34, and Palermo close to 37. Parts of Sicily and Sardinia continued to experience temperatures exceeding 40 degrees. Northern regions reported lower temperatures and more volatile weather, resulting in a stark contrast between the intense heat in the south and storm activity in the north.
Italy’s Civil Protection Department issued separate yellow alerts for thunderstorms and rainfall in parts of Emilia-Romagna, Lombardy, Marche, and Veneto. These warnings addressed typical weather hazards rather than the heat-health alert system. As a result, Italy managed two distinct threats on Monday: dangerous heat across many central and southern cities, and storm risks in several northern and Adriatic areas. Local authorities continued to oversee both situations.
Health advisories focus on peak daytime temperatures
Health officials recommended residents and visitors avoid direct sunlight during peak hours, limit strenuous outdoor activities, stay well-hydrated, opt for light meals, and keep indoor environments cool. Particular attention remains essential for older adults, infants, pregnant women, and those with heart, lung, or chronic illnesses. Residents are encouraged to check on neighbors or relatives living alone who may need assistance during extended heat episodes.
The increase from 14 red alerts on Sunday to 17 on Monday reflects new maximum warnings for Catania, Messina, and Reggio Calabria. The other 14 cities maintained Level 3 alerts for a second consecutive day. Italy provides ongoing heat bulletins throughout the summer, enabling residents and local authorities to monitor city-specific health risks. The latest updates kept Rome, several regional capitals, and major tourist destinations under the country’s highest heat warning as the heatwave continued.