Snow and Ice Yellow Alert Disrupts Île-de-France Transport on January 2-3, 2026

Île-de-France is experiencing significant transport disruptions as a 'snow-ice' yellow alert, issued by Météo-France, remains in effect for Friday, January 2, and Saturday, January 3, 2026. The alert, which initially covered 52 departments across France, highlights a substantial risk of black ice and light snowfall, particularly impacting the region's extensive public transport network.

Alert Details and Affected Areas

The yellow alert for 'snow-ice' specifically targets four departments within Île-de-France: Yvelines (78), Val-d'Oise (95), Essonne (91), and Seine-et-Marne (77). While the alert for Yvelines, Val-d'Oise, and Essonne began at 9 p.m. on January 2, Seine-et-Marne was under vigilance for the entire day. Temperatures hovering around 0°C or below are exacerbating the risk of black ice formation on roads, sidewalks, and transport platforms. Light snow showers were anticipated in areas such as Seine-et-Marne, Essonne, and the southern parts of Yvelines.

Public Transport Impact and Recommendations

Transilien SNCF has issued warnings regarding potential disruptions to its services, affecting several lines including H, J, K, R, P, and N. Similarly, RER lines C, D, and E could also experience delays and service adjustments. The primary concern is not the volume of snow, but rather the reduced grip caused by ice, which can affect switches, platforms, and overall traffic conditions. Passengers are strongly advised to:

• Check train schedules and real-time traffic updates via the SNCF app, Île-de-France Mobilités app, or official X (formerly Twitter) accounts before traveling.
• Allow for additional travel time.
• Limit non-essential travel, especially by road, due to the high risk of slipping.

The RATP and SNCF networks are working to manage the situation, with communication on the ground designed to guide users.

Broader Context and Outlook

This 'snow-ice' episode is part of a broader cold wave affecting France at the beginning of 2026. In anticipation of severe cold, the Île-de-France prefecture had already activated an extreme cold plan three days prior to boost support for the homeless. While the weather is expected to become drier and sunnier over the weekend, temperatures are likely to remain cold, fluctuating between 1°C and 3°C, with freezing rain remaining a significant risk in some areas. Authorities continue to monitor the situation closely, with vigilance maps updated regularly.