Colombia: Major flooding in Cali November 15-16

Event

Twelve hours of torrential rains that began in the early morning of Wednesday, November 15, have resulted in widespread flooding as well as landslides and collapsed structures in the city of Cali (Valle del Cauca department). According to the Valle del Cauca government, some 11 cm (4.5 in) of rain fell in the 12-hour period - with up to 18 cm (7 in) in isolated areas - typically the amount of rain received in a month’s time. Water levels of the Pance and Cali rivers have risen although, as of late November 15, there have been no reports of overflowing.

Power outages and water cuts have been reported in various areas of the city (notably in the south and east). Streets have been flooded and/or blocked by landslides and other debris (an estimated 120 tons’ worth). No fatalities have been reported.

According to a spokesman for the Cali fire department, flood waters were expected to begin to subside overnight November 15-16. However, transportation and business disruptions are possible throughout the day on Thursday as cleanup efforts get underway. An orange alert for flash flooding issued by the Colombian Institute of Hydrology, Meteorology, and Environmental Studies (IDEAM) remains in place for Cali and the nearby city of Palmira as of early Thursday; higher red alerts are in place for the Valle del Cauca municipalities of Buenaventura and Dagua.

Context

Flooding and landslides are common in Colombia during the rainy seasons, which typically occur in April-May and October-November. The current rainy season has been more intense than usual due to the cyclical climatic phenomenon La Niña. According to IDEAM, heavy rains, and consequent flooding and landslides, are expected in Colombia until the third week of December. Generally speaking, the flood risk is highest along rivers and the landslide risk is highest in hilly or mountainous zones, particularly in poorer areas lacking proper building code standards.

Advice

Individuals present in affected areas are advised to monitor developments to the situation and to adhere to any orders issued by the local authorities. Remember that driving or walking through running water can be dangerous - 15 cm (6 in) of running water is enough to knock over an adult - and that floodwater may contain wastewater or chemical products; all items having come into contact with the water should be disinfected and all foodstuffs discarded.