Paris Metro Line 4 disrupted by technical incident amid heatwave

Paris Metro Line 4 faced severe disruptions on Friday morning following a "technical incident," adding to travel woes in the capital. The automatic line, running between Porte de Clignancourt and Bagneux, had already experienced a breakdown on Thursday evening.

On Friday, the RATP reported that traffic was completely halted between Porte de Clignancourt and Réaumur - Sébastopol stations, with the rest of the line experiencing disruptions. The transport authority initially estimated service restoration around 10 a.m., revising earlier predictions of 7 a.m. and 8:30 a.m.

This disruption is expected to cause significant passenger overflow onto RER lines B and D, as well as Metro Line 5. User association "Plus de trains" warned of potential congestion between Gare du Nord and Châtelet/Bastille.

Compounding the issue, Paris is currently experiencing a severe heatwave with temperatures nearing 40 degrees Celsius. The RATP advised passengers, particularly the vulnerable, to limit or postpone travel. The authority also reminded the public that transport infrastructure and rolling stock are susceptible to high temperatures, potentially leading to further disruptions across various lines.