What happened
Severe rain overnight flooded parts of Istanbul, affecting homes, commercial premises, roads and underpasses. Vehicles became stranded, traffic was heavily disrupted and, in some neighbourhoods, moving water pushed cars into one another.
The Istanbul governor’s office reported three fatalities and said five people were still unaccounted for. Environment, Urbanisation and Climate Change Minister Murat Kurum said emergency teams had moved more than 3,000 stranded people to safety.
Kurum said the downpour was the most intense recorded in Istanbul for 83 years. The event also affected areas beyond the city: a two-storey building on a riverbed collapsed in Sakarya province, while one person was reported missing in neighbouring Kocaeli province.
Why it matters
The flooding disrupted everyday mobility, access to workplaces and public services in Türkiye’s largest city. The governor’s office kept schools closed on Friday, and some state employees were granted leave on Thursday. Authorities also prohibited motorcycle traffic and urged residents to stay indoors.
For organisations, the immediate concern is continuity of access to sites, staff safety and transport-dependent operations. Flooded premises and disrupted roads can constrain deliveries, commuting and emergency response even after rainfall subsides.
Kurum linked the event to the climate crisis, saying changing rainfall patterns are producing more intense downpours. That is an official assessment of the incident rather than an attribution study, but it underlines the operational importance of preparing urban assets and supply routes for extreme rainfall.
What to watch next
Türkiye’s weather agency expects additional showers in Istanbul and nearby areas in the coming days. Organisations with personnel, facilities or logistics routes in the affected area should monitor official weather and traffic updates, review site access arrangements, and follow local restrictions.
Schools were due to remain shut on Friday, while the motorcycle restriction was to stay in place until authorities withdraw it. The reported missing people and damage across the wider region remain key indicators of the event’s continuing impact.
