Johor hit by 'worst flash floods in 10 years' on Aug. 2 after 100mm rainfall within an hour

High tide of 3.3 metres also prevented floodwaters from draining out to sea.

Gawain Pek | August 04, 2022, 11:21 AM

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The neighbouring Johor Bahru was hit by flash foods across the city on Aug. 2, 2022.

According to Astro Awani, numerous main roads were affected including Jalan Ayer Molek, Jalan Wong Ah Fook, Jalan Tun Abdul Razak, Jalan Kolam Air, and Jalan Yahya Awal.

Multiple local media outlets described the Aug. 2 floods as the "worst flash floods" that hit Johor in 10 years.

JB flash floods on Aug. 2 Flooding along Jalan Ayer Molek on Aug. 2. Image via eNanyang.

Photo via Pejabat Penerangan Daerah Johor Bahru/Facebook.

Image via eNanyang.

Screenshot of video via Pejabat Penerangan Daerah Johor Bahru/Facebook.

Flood waters could also be seen from the overhead bridge connecting JB Sentral with City Square Mall.

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Speaking to The Star, Hiap Joo Bakery and Biscuits Factory person-in-charge of operations James Lim said that the store was hit by flood waters beginning around 12.30pm.

"We were busy baking our banana cakes and attending to customers when our place was hit by a flash flood," he told The Star.

Hospital Sultanah Aminah bogged down by flood waters

The flood also affected the Kampung Mohd Amin and Hospital Sultanah Aminah area.

Some cars parked at the hospital were damaged by the flood waters and had to be towed away, wrote one twitter user.

Nurses were also seen re-arranging chairs in an waiting area as floodwaters seeped into the building due to an overflowing drain, Free Malaysia Today reported.

Photo via Ken Kem/Facebook.

Photo via Ken Kem/Facebook.

Johor's Chief Minister Onn Hafiz Ghazi made a visit to the hospital to assess the damage, writing on Facebook that Aug. 2 was a day that "tested Johor's citizens".

jb flash flood on august 2 Image via Oon Hafiz/Facebook

jb flash flood on aug. 2. Image via Oon Hafiz/Facebook

100mm rainfall and 3.3m high tide caused floods

In a statement, Oon Hafiz said that rainfall reached up to 100mm within an hour, Bernama reported.

The usual rainfall is around 10mm to 20mm, Oon Hafiz added.

Coincidentally, a high tide of 3.3 metres prevented "floodwater from flowing out", Oon Hafiz said.

To put the rainfall in context, 100mm is about a month's worth of rain in Singapore in February.

The chief minister has instructed local authorities and Johor's Public Works, Transportation and Infrastructure Committee chairman to take action so as to prevent future flash floods.

Johor's mayor Datuk Mohd Noorazam Osman also shared in a statement that the Johor Bahru City Council (MBJB) has issued notices to three land developers for "failing to control land development works in MBJB areas and for causing today's flash floods", Bernama reported.

The flood waters fully subsided by 2:30pm on Aug. 2, Bernama wrote.

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Top image via Rosminah Jumaat/Facebook.