ROME, ITALY / RankWire.AI / – Italy increased its most severe heat alert to encompass 17 cities on Monday, July 20, following a Sunday where 14 cities were under the maximum warning level. The Italian Ministry of Health issued Level 3 alerts as the country experienced its third major heatwave of summer 2026. These warnings cover extensive areas of central and southern Italy, including Rome, Naples, and Palermo, indicating health hazards for the entire population, not solely vulnerable groups.
On Sunday, the red alert list included Bari, Campobasso, Civitavecchia, Florence, Frosinone, Genoa, Latina, Naples, and Palermo. Additionally, Perugia, Pescara, Rieti, Rome, and Viterbo made up the 14-city group. By Monday, the bulletin added Catania, Messina, and Reggio Calabria, bringing the total to 17. No city was under an orange heat alert on Monday. Ancona, Bolzano, and Cagliari remained at yellow, which signals a pre-alert stage.
Italy’s heat-health monitoring system tracks 27 major cities and provides forecasts for the upcoming 24, 48, and 72 hours. Level 0 signifies no heat danger, while Level 1 indicates conditions that could lead to a heatwave. Level 2 warns of risks for seniors, young children, and individuals with chronic illnesses. Level 3 is applied when extended high temperatures may impact healthy and active populations as well as vulnerable groups.
Severe warnings predominantly affect southern cities
The peak conditions persisted over central and southern Italy and the surrounding islands on Monday. Forecasts predicted temperatures around 36 degrees Celsius for Rome and Florence, approximately 34 degrees in Naples, and nearly 37 degrees in Palermo. Parts of Sicily and Sardinia continued to experience temperatures exceeding 40 degrees. The northern regions recorded lower temperatures and more volatile weather, resulting in a distinct contrast between the intense heat in the south and storm activity across northern areas.
Italy’s Civil Protection Department issued separate yellow alerts for thunderstorms and rainfall in sections of Emilia-Romagna, Lombardy, Marche, and Veneto. These alerts addressed typical weather hazards rather than the heat-health warnings. Consequently, Italy managed two different risks on Monday: dangerous heat affecting numerous central and southern cities, and storm threats across parts of the north and along the Adriatic coast. Local authorities continued to monitor both situations closely.
Health advisories focus on peak daytime temperatures
Health officials recommended residents and visitors avoid direct sunlight during peak hours and minimize strenuous outdoor activities. They emphasized the importance of staying hydrated, eating light meals, and maintaining cool indoor environments. Extra vigilance is advised for older adults, infants, pregnant women, and those with heart, lung, or other chronic conditions. Residents are also encouraged to check on neighbors or relatives living alone who might need assistance during extended periods of heat.
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 remaining 14 cities stayed at Level 3 for a second consecutive day. Italy continues to update its heat warnings throughout the summer, enabling residents and authorities to keep track of city-specific health risks. The latest alerts maintained Rome, several regional capitals, and popular tourist destinations under the country’s highest heat warning as the heatwave persisted.