Guam – Typhoon Mangkhut Damages Homes and Power Supply

Tropical Cyclone ‘Mangkhut’ formed over the North West Pacific Island on 07 September, 2018, and moved toward Guam and the Northern Mariana Islands, causing wind damage and some flooding from heavy rain.

Since then Mangkhut has strengthened and is moving towards the Philippines as a Super Typhoon. It is forecast to continue west-north-west and reach northern Luzon and the Babuyan Islands (Philippines) on 14-15 September. Heavy rain, storm surge and strong winds are likely to affect the northern Philippines, southern Taiwan and possibly Hong Kong and parts of southern China.

Track of Typhoon Mangkhut as of 12 September 2018. Image: NWS Guam / NOAA

Guam and Northern Mariana Islands

As of 10 September, around 2,100 people had evacuated their homes and were staying in emergency shelters in Guam. Others in vulnerable locations, including tourists in hotels, were warned to stay indoors during the storm. Schools, offices, shops and the airport were all closed temporarily.

According to local media, Typhoon Mangkhut damaged homes, caused widespread power outages, knocked down power poles, flooded some areas and uprooted large trees. Dededo and Yigo were among the worst hit areas.

Most of the damage was caused by strong winds, although some flooding was reported in Yigo. As much as 145.3 mm of rain was recorded in 24 hours to 11 September in Agana.

Guam Governor Eddie Calvo will request the federal government to declare a state of emergency for Guam.

Meanwhile the US government has already declared a state of emergency for the Commonwealth of the Northern Mariana Islands after Rota was hit by the storm late on Monday, 10 September, 2018. Rota is the southernmost island of the United States Commonwealth of the Northern Mariana Islands.

Typhoon Mangkhut approaches Rota, Northern Mariana Islands, 10 September 2018. Image: NWS Guam / NOAA

Philippines

Typhoon Mangkhut is expected to enter the Philippine Area of Responsibility (PAR) Wednesday afternoon. Known locally as ‘Ompong’ the storm was last observed 1,390 km east of southern Luzon, with maximum sustained winds of 220 km/h per hour near the centre. Moderate to heavy rain is expected across Luzon and other parts of the country from Wednesday 12 September.

Flood Summary

Last updated: September 19, 2018
Event
Typhoon Mangkhut, Guam, Northern Mariana Islands, Philippines and China
Date
September 10 to September 19, 2018
Type
Coastal flood, Flash flood, Landslide
Cause
Storm surge, Extreme rainfall

Locations

A - Yigo (Guam)
B - Dededo (Guam)
C - Rota, Northern Mariana Islands (Northern Mariana Islands)
D - Itogon (Philippines)
E - Calabarzon (Philippines)
F - Central Luzon (Philippines)
G - Ilocos Region (Philippines)
H - Guangdong Province (China)

Magnitude

Rainfall level
145.3 mm in 24 hours
Agana, Guam - September 10 to September 11, 2018
WMO figures. Agana is also known as Hagåtña
Rainfall level
223.2 mm in 24 hours
Laoag, Philippines - September 14 to September 15, 2018
All rainfall figures for China and Philippines via Ogimet
Rainfall level
268.2 mm in 24 hours
Tuguegarao, Philippines - September 14 to September 15, 2018
Rainfall level
347.8 mm in 24 hours
Iba, Philippines - September 14 to September 15, 2018
Rainfall level
543 mm in 24 hours
Baguio, Philippines - September 14 to September 15, 2018
Rainfall level
289.6 mm in 24 hours
Baguio, Philippines - September 15 to September 16, 2018
Rainfall level
117.6 mm in 24 hours
Laoag, Philippines - September 15 to September 16, 2018
Rainfall level
123 mm in 24 hours
Shenzhen, China - September 15 to September 16, 2018
Rainfall level
284 mm in 24 hours
Yangjiang, China - September 16 to September 17, 2018
Rainfall level
158.5 mm in 24 hours
Shangchuan Dao, China - September 16 to September 17, 2018
Rainfall level
118 mm in 24 hours
Haikou, China - September 16 to September 17, 2018
Rainfall level
83.1 mm in 24 hours
Hechi, Guangxi Zhuang Autonomous Region, China - September 17 to September 18, 2018

Damages

Evacuated
2,100
Guam - September 9 to September 11, 2018
Airport was closed, power outages reported
Fatalities
70 people
Philippines - September 12 to September 19, 2018
Local media (quoted by DG-ECHO) reported over 70 fatalities, with 50 missing (including from the landslides in Itogon Municipality. Alternatively, as of 19 September NDRRMC reported 8 deaths from storm Mangkhut.
Fatalities
4 people
Guangdong Province, China - September 16 to September 18, 2018
Evacuated
245,775
Philippines - September 12 to September 18, 2018
Evacuated
2,500,000
Guangdong Province, China - September 14 to September 18, 2018
Buildings destroyed
130 buildings
Philippines - September 12 to September 18, 2018