Areas affected include Segambut Indah, Sungai Penchala and the Central Market area towards Brickfields.
The Tanjung Bungah Residents Association says MBPP did not conduct site checks despite knowing that a steep slope was under construction there.
It says 'remote-control' supervision of worksite via WhatsApp by an engineer was 'negligence of the worse kind'.
Court adjourns the case to Sept 27 to await decision from AGC.
More heavy rain was forecast for southeastern China with authorities warning of possible flash floods, mudslides and landslides caused by the downpours.
Search and rescue teams are racing to find survivors and recover bodies from the deep sludge with excavators and their bare hands.
Dozens die each year in landslides caused by jade mining, a dangerous and poorly regulated industry in Kachin state between the country's borders with China and India.
The worker recalls seeing the landslide which buried four of his workmates alive at a resort in Batu Ferringhi.
City engineer says all activities at the resort have been ordered to stop until the council has obtained advice and recommendations on public safety.
Only one lane of the road to tourist spots had been open following Tuesday's landslide that took the lives of 4 workers.
USM's Associate Prof Ahmad Hilmy Abdul Hamid says vibrations from passing heavy vehicles could weaken the earth and road foundations at the site of the landslide in Batu Ferringhi.
Work to take three to four weeks to ensure both lanes of Jalan Batu Ferringhi are safe to use.
The resort owner has also been issued a stop-work order and told to cordon off the affected area.
Penang Forum asks how MBPP could have missed the unauthorised earthworks at Batu Ferringhi which caused a landslide on Tuesday night.
The only decent road to Batu Ferringhi is reduced to one lane.
Meenakshi Raman says the construction site should have been monitored by the authorities, especially given that no permission was obtained for the work.
Authorities say the construction work was carried out without permission from the local council.
This comes after 20 were killed in two landslide incidents at construction sites on the island over the past 20 months.
Rescuers say they can hear the voices of some of those trapped in makeshift mining shafts and believe many are still alive.
If the city council and officers and others involved in the project walk away scot free, it will only promote impunity, says consumer group.
Many factors, including heavy rain, contributed to Penang landslide.
Penang Island City Council says its officials and consultants will carry out regular checks to ensure specifications are met.
Parts of the provincial capital Makassar have also been affected.
The Department of Safety and Health says stop-work order is still in effect although work to strengthen surrounding slopes is allowed.