Malaysia: Disruptions due to flooding ongoing in Johor Bahru in Johor State as of Sept. 26

Event

Disruptions due to flooding are ongoing across parts of Johor Bahru, Johor State as of Sept. 26. Heavy rainfall early Sept. 25 resulted in flash flooding in the city. As of the evening of Sept. 26, 222 people from 59 families remain evacuated at four relief centers in Batu Pahat and Pontian.

The Malaysian Meteorological Service has forecast further isolated rain over parts of the state through at least Oct. 2. Additional downpours could trigger further flooding due to high river levels and saturated ground, as well as hamper ongoing response and recovery operations.

Hazardous Conditions
Further rainfall could trigger flooding in low-lying communities near rivers, streams, and creeks. Urban flooding is also possible in developed areas with easily overwhelmed or a lack of stormwater drainage systems. Sites located 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 rainfall has saturated the soil. Disruptions to electricity and telecommunications services are likely where significant flooding, landslides, or strong winds impact utility networks.

Transport
Floodwaters and debris flows could render some bridges, rail networks, or roadways impassable, impacting overland travel 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. Flooding could block regional rail lines; freight and passenger train delays and cancellations are possible in areas that see heavy rainfall and potential track inundation. Localized business disruptions may occur in low-lying areas.

Health
Flooding could heighten the threat of disease outbreaks. Backflow from drains mixed with floodwaters can become trapped in open areas when inundations recede. These stagnant pools often become a breeding ground for mosquitoes and bacteria, increasing the incidence of insect- and water-borne diseases. Exposure to contaminated water from inundated industrial sites, sewer systems, and septic tanks also poses a significant health threat.

Advice

Seek updated information on weather and related disruptions, including road conditions before driving or routing shipments through areas where severe weather is forecast. Plan accordingly for potential freight delivery delays if routing shipments by truck through the affected area. Do not attempt to drive through flooded areas. Charge battery-powered devices if prolonged electricity outages occur.

Resources

Malaysian Meteorological Department
JKR Disaster Management Official Website (eBENCANA)