Italy: Adverse weather forecast across northern and central regions through at least May 16

Severe weather is forecast across much of northern and parts of central Italy through at least May 16. A weather system is expected to bring thunderstorms to northern regions and elevated areas of central Italy overnight May 13-14, with the most severe weather likely in northwestern areas. Heavy downpours, strong wind gusts, lightning, and hail may accompany storms. A second weather system is expected to move across northern Italy late May 14-16, bringing further heavy rainfall, thunderstorms, and strong winds to the region.

As of May 13, officials have issued the following weather warnings across the country:

• Orange thunderstorm warnings (the middle level on a three-tier scale): Piedmont Region.

• Yellow thunderstorm warnings: Abruzzo, Emilia-Romagna, Lombardy, Marche, Molise, and Umbria regions.

Officials will likely update and extend the coverage of weather alerts over the coming days.

Sustained heavy rainfall could trigger flooding in low-lying communities near rivers, streams, and creeks. Urban flooding is also possible in developed areas with easily overwhelmed stormwater drainage systems. Sites downstream from large reservoirs or rivers may be subject to flash flooding after relatively short periods of intense rainfall. Landslides are possible in hilly or mountainous areas, especially where heavy rain has saturated the soil.

Authorities could issue mandatory evacuation orders for flood-prone communities over the coming days. Disruptions to electricity and telecommunications services are possible where significant flooding or landslides impact utility networks.

Floodwaters and debris flows may render some bridges, rail networks, or roadways impassable, impacting overland travel in and around affected areas. Ponding on road surfaces could cause hazardous driving conditions on regional highways. Authorities could temporarily close some low-lying routes that become inundated by floodwaters. Disruptive weather may cause delays and cancellations at airports in the affected regions. Flooding could block regional rail lines; freight cancellations are possible in areas with heavy rainfall and potential track blockages.

Localized business disruptions may occur in areas impacted by severe weather; some businesses might not operate at full capacity because of damage to facilities, possible evacuations, and some employees' inability to reach work sites.