The northeastern region normally witnesses normal or heavy rainfall during the four months of the southwest monsoon.
Tremors were felt in the entire region, including neighbouring Meghalaya and northern parts of West Bengal.
Sikkim is one of the most beautiful states of India with the Himalayas enhancing its looks.
Landslides were reported from several areas across the state and PWD workers were pressed into service to clear the debris.
The best time to visit is April to July when the valley is in bloom – however, the monsoons in those months, make it a tough hike.
The IMD has informed that heavy rainfalls are very likely over Uttarakhand, Uttar Pradesh, Bihar, Sub-Himalayan West Bengal, Sikkim and northeastern states for the remainder of July.
Goalpara is the worst-hit district with over 4.7 lakh people suffering, followed by Barpeta with more than 4.6 lakh people and Morigaon with around 3.8 lakh people affected.
The total number of people losing their lives in this year's flood and landslides in the state has gone up to 102. While 76 people died in flood-related incidents, 26 were killed in landslides.
The state has witnessed a series of quakes ranging from 4.2 to 5.5 magnitude in the last one month. The northeast and the Andaman and Nicobar islands are high-seismic zones.
Till Sunday, more than 12.97 lakh people had been affected by the deluge across 24 districts. Barpeta is the worst-hit district followed by South Salmara and Dhemaji.