One of the NGOs, Cuci Malaysia, had over 400 registered volunteers join the effort.
Cuci Malaysia president Chandra Arjun said other challenges at the site included insufficient water and electricity supply in some areas.
“We had to bring in our own water tanker and genset to use water jets for cleaning.
“In some areas, the mud had already dried up, so we had to resort to manually removing them by hacking with hoes and carrying it out.”
He said the one-day cleanup initiative targeted about 50 houses and would respond to any other requests for help, where possible later on.