According to the India Meteorological Department (IMD), there are chances of heavy to very heavy rainfall over Sub-Himalayan West Bengal and Assam, Meghalaya, during the next three days and isolated heavy rainfall thereafter.

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The cyclonic circulation is going on over northeast Bangladesh, and strong southwesterly/southerly winds are prevailing from the Bay of Bengal to northeast India in lower tropospheric levels.

This is giving rise to widespread light to moderate rainfall accompanied by thunderstorms, lightning, and gusty winds (30–40 kmph) that is likely over Arunachal Pradesh, Assam & Meghalaya, Nagaland, Manipur, Mizoram & Tripura, and sub-Himalayan West Bengal during the next five days, said met department.

The Met Department also predicted that there would be isolated heavy to very heavy rainfall over sub-Himalayan West Bengal and Sikkim, Assam and Meghalaya, Arunachal Pradesh, Nagaland, Manipur, Mizoram, and Tripura during the next 5 days, with extremely heavy rainfall over Assam and Meghalaya and sub-Himalayan West Bengal on June 19, 2024.

Scattered to fairly widespread light to moderate rainfall accompanied by thunderstorms, lightning, and gusty winds (30–40 kmph) is very likely over Gangetic West Bengal, Bihar, Jharkhand, and Odisha during the next 5 days.

List of states and the amount of rainfall they are experiencing with the warnings given by the IMD:

Coastal Karnataka is to get isolated heavy (64.5–115.5 mm) to very heavy rainfall (115.5–204.4 mm) to extremely heavy falls (>204.4 mm) during June 21–23, 2024. (ORANGE ALERT)

South Interior Karnataka is to get isolated heavy (64.5–115.5 mm) to very heavy rainfall (115.5–204.4 mm) to extremely heavy falls (>204.4 mm) during June 21–23, 2024. (ORANGE ALERT)

Kerala and Mahe are to get isolated heavy (64.5–115.5 mm) to very heavy rainfall (115.5–204.4 mm) to extremely heavy falls (>204.4 mm) during June 21–23, 2024. (ORANGE ALERT)

Tamil Nadu, Pondicherry, and Karaikal are likely to get isolated heavy (64.5–115.5 mm) to very heavy rainfall (115.5–204.4 mm) on June 22 and 23, 2024. (ORANGE ALERT)

Konkan & Goa is to get isolated heavy (64.5-115.5 mm) to very heavy rainfall (115.5-204.4 mm) on June 19th and 20th and likely to get isolated heavy (64.5-115.5 mm) to very heavy rainfall (115.5-204.4 mm) during June 21st–23rd, 2024. (ORANGE ALERT)
Arunachal Pradesh is to get isolated heavy (64.5–115.5 mm) to very heavy rainfall (115.5–204.4 mm) on June 19 and 20, 2024. (ORANGE ALERT)

Nagaland, Manipur, Mizoram, and Tripura are to get isolated heavy (64.5–115.5 mm) to very heavy rainfall (115.5–204.4 mm) on June 19 and 20, 2024. (ORANGE ALERT)

Sub-Himalayan West Bengal & Sikkim get isolated heavy (64.5-115.5 mm) to very heavy (115.5-204.4 mm) to extremely heavy falls (>204.4 mm) on 19th & 20th June & likely to get heavy (64.5-115.5 mm) to very heavy rainfall (115.5-204.4 mm) during 21st-23rd June, 2024 (RED ALERT)

Assam and Meghalaya are to get isolated heavy (64.5–115.5 mm) to very heavy rainfall (115.5–204.4 mm) to extremely heavy falls (>204.4 mm) on June 19 and 20. (RED ALERT)

Also, there are mere chances of heavy rainfall over Bihar during June 19–23, Odisha on June 19, and Jharkhand on June 20 and 21, 2024.

Due to severe rainfall, the department has released a few measures that should be followed by the people:

IMPACT:

The regions could experience localized flooding of roads, water logging in the low-lying areas, and underpass closures, mostly in the region's urban regions.
Also, the people could face traffic diversions due to water logging on the roads. There are also possibilities of damage to vulnerable structures and landslides, mudslides, landsinks, etc.
Possibility of minor damage to roads and other vulnerable structures.
Damage to horticulture and standing crops in some areas due to the inundation.
It may lead to riverine flooding in some river catchments (for riverine flooding, please visit the web page of the CWC).

Suggested Action:

Check for traffic congestion on your route before leaving for your destination.
Follow any traffic advisories that are issued in this regard.
Avoid going to areas that face water logging problems often.
Avoid staying in a vulnerable structure.