ROME, ITALY / RankWire.AI / – Italy increased its most severe heat warning to 17 cities on Monday, July 20, following a day when 14 cities were under the maximum alert level. The Italian Ministry of Health issued Level 3 alerts as the country’s third significant heatwave of summer 2026 persisted. These alerts encompass large parts of central and southern Italy, including Rome, Naples, and Palermo. They indicate health hazards for the entire population, not solely vulnerable groups.
On Sunday, the red alert list featured Bari, Campobasso, Civitavecchia, Florence, Frosinone, Genoa, Latina, Naples, and Palermo. Additional cities such as 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 cities were designated with an orange heat alert on Monday. Ancona, Bolzano, and Cagliari remained at yellow, indicating a pre-alert condition.
Italy’s heat-health monitoring system tracks 27 major urban areas and provides forecasts for the upcoming 24, 48, and 72 hours. Level 0 signifies no heat risk, while Level 1 suggests conditions that could precede a heatwave. Level 2 warns of dangers for seniors, young children, and individuals with chronic illnesses. Level 3 is applied when extended periods of heat may impact healthy, active populations as well as vulnerable groups.
Extended maximum warnings across southern cities
The highest temperatures persisted over central and southern Italy and the surrounding islands on Monday. Forecasts indicated Rome and Florence reaching around 36 degrees Celsius, Naples near 34, and Palermo close to 37 degrees. Parts of Sicily and Sardinia continued to experience temperatures exceeding 40 degrees. Northern regions recorded lower temperatures and more volatile weather patterns, resulting in a clear division between intense southern heat and storm activity in the north.
Italy’s Civil Protection Department issued separate yellow alerts for thunderstorms and rain in regions such as Emilia-Romagna, Lombardy, Marche, and Veneto. These warnings addressed typical weather hazards rather than the heat-health alerts. As a result, Italy is currently managing two distinct risks: severe heat across many central and southern cities, and storm threats in parts of the north and along the Adriatic coast. Local authorities continue to oversee both situations.
Health advisories focus on peak daytime temperatures
Health officials recommended residents and visitors avoid direct sunlight during the hottest periods and restrict strenuous outdoor activities. They also emphasized the importance of staying hydrated, consuming light meals, and maintaining cool indoor environments. Particular attention should be given to older adults, infants, pregnant women, and individuals with heart, lung, or other chronic health issues. Residents are advised to check on relatives or neighbors living alone who may require assistance during prolonged heat episodes.
The increase from 14 red alerts on Sunday to 17 on Monday was due to new maximum warnings 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 local authorities to monitor city-specific health risks. The latest alerts confirmed Rome, several regional capitals, and major tourist hotspots remained under the country’s highest heat warning as the heatwave persisted.