During the monsoon season in Malaysia, there was a heavy downpour on December 18, 2021, which continued unabated for 36 hours. The rains caused extensive flooding in the Klang Valley, Kuala Lumpur, with water levels rising to dangerous levels. The most affected was the Langat area, which consists of several villages, including Dusun Tua, where four houses were washed away, and fifteen homes were severely damaged.
The SSSIO of Malaysia quickly sprang into action and mobilized resources. Its medical professionals established medical camps and went from home to home to offer medical assessments, first aid, screening for chronic diseases, and counselling and preventive care. Patients suffering from diabetes, hypertension, and other chronic diseases were given medicines based on records obtained from local clinics and hospitals, as their own records were lost in the floods.