India – Torrential Rain Causes Deadly Flooding in Tamil Nadu

The Northeast Monsoon brought heavy rain to parts of the southern Indian state of Tamil Nadu, including the state capital Chennai, from 30 October, 2017.

Some street flooding was reported in Chennai on Monday, 30 October bringing much of the city to a standstill. According to India’s SkyMet Minambakkam Observatory in Chennai recorded whopping 169 mm of rain and Nungambakkam 116 mm in a 24 hour period to 31 October.

Local media reported that many Chennai residents feared a repeat of the November 2015 flood disaster which caused $3 billion of damage the deaths of over 340 people.

The rain continued to fall in Chennai on Tuesday and Wednesday, with 41 mm of rain recorded in 24 hours at Minambakkam Observatory on 01 November.

On Thursday intensity of the rain increased once again and the Tamil Nadu state disaster management authority closed schools and colleges in Chennai, Tiruvallur and Kanchipuram and advised residents of Chennai to stay indoors.

According to WMO figures, Minambakkam observatory in Chennai recorded 141 mm in a 24 hour period to 03 November. SkyMet say that 183 mm of rain was recorded at Nungambakkam observatory in Chennai during the same period. Chennai typically sees 353 mm of rain during the whole of an average November according to WMO figures.

As of early 03 November, some precautionary evacuations had already been carried out. Tamil Nadu State Disaster Management Agency said that 3,737 people were sheltered in 115 relief centres across the state.

As well as Chennai, severe flooding was also reported in the district of Tirunelveli, Tamil Nadu, where roads have been blocked and a bridge washed away.

According to media at least 4 people have died in the floods across Tamil Nadu. One woman drowned in flood water in the Otteri district of Chennai. Three other fatalities occurred in Cuddalore, where one woman died when a wall collapsed and two others were electrocuted in flood water in separate incidents.

Rainfall Warnings

On 03 November, India Meteorological Department (IMD) issued an orange (mid level) warning for parts of the state, saying that “heavy to very heavy rain in isolated places is very likely over coastal Tamil Nadu and Puducherry; heavy rain in isolated places over interior Tamil Nadu, Rayalaseema (Anantapur, Chittoor, Kadapa and Kurnool districts in Andhra Pradesh) and south coastal Andhra Pradesh are also very likely.

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Featured photo: file photo of floods in Chennai for illustration only. Credit: Prince Roy, under Creative Commons.

Flood Summary

Last updated: November 14, 2017
Event
Tamil Nadu, India and Sri Lanka, October to November 2017
Date
October 30, 2017
Type
Urban flood, River flood
Cause
Extreme rainfall, Long-term rainfall
Northeast monsoon rains affected Tamil Nadu in India and parts of Sri Lanka from late October 2017.

Locations

A - Chennai (India)
B - Tiruvallur (India)
C - Kanchipuram (India)
D - Tirunelveli (India)
E - Cuddalore (India)
F - Laggala (Sri Lanka)
G - Jaffna (Sri Lanka)

Magnitude

Rainfall level
190 mm in 24 hours
Anaikaranchatram, Tamil Nadu, India - November 5 to November 6, 2017
Rainfall level
150 mm in 24 hours
Chidambaram, Tamil Nadu, India - November 5 to November 6, 2017
Rainfall level
140 mm in 24 hours
Sirkali, Tamil Nadu, India - November 5 to November 6, 2017
Rainfall level
140 mm in 24 hours
Papanasam, Tamil Nadu, India - November 4 to November 5, 2017
Rainfall level
120 mm in 24 hours
Manimutharu, Tamil Nadu, India - November 4 to November 5, 2017
Rainfall level
120 mm in 24 hours
Nagapattinam, Tamil Nadu, India - November 4 to November 5, 2017
Rainfall level
160 mm in 24 hours
Vedaranyam, Tamil Nadu, India - November 3 to November 4, 2017
Rainfall level
130 mm in 24 hours
Thiruthuraipoondi, Tamil Nadu, India - November 3 to November 4, 2017
Rainfall level
300 mm in 24 hours
DGP office Chennai, Tamil Nadu, India - November 2 to November 3, 2017
Rainfall level
180 mm in 24 hours
Chennai North, Tamil Nadu, India - November 2 to November 3, 2017
Rainfall level
140 mm in 24 hours
Parangipettai, Tamil Nadu, India - November 2 to November 3, 2017
Rainfall level
102.5 mm in 24 hours
Anuradhapura, Sri Lanka - November 4 to November 5, 2017
Rainfall level
73 mm in 24 hours
Mannar, Sri Lanka - November 8 to November 9, 2017
Rainfall level
50.8 mm in 24 hours
Jaffna, Sri Lanka - November 10 to November 11, 2017
Rainfall level
40.5 mm in 24 hours
Anuradhapura, Sri Lanka - November 10 to November 11, 2017

Damages

Fatalities
12 people
Tamil Nadu, India - November 1 to November 6, 2017
Evacuated
10,000
Tamil Nadu, India - November 1 to November 6, 2017
105 relief camps set up by state
Fatalities
8 people
Laggala, Matale, Sri Lanka - November 2 to November 6, 2017
Affected
13,197
Jaffna, Sri Lanka - November 2 to November 14, 2017
Buildings destroyed
46 buildings
Jaffna, Sri Lanka - November 2 to November 13, 2017
Fatalities
1 person
Jaffna, Sri Lanka - November 12 to November 14, 2017

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