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Page 1
Harmonisation ofEarly Warning Alert Levels
IGNITE Stage
World Conference on Disaster Risk ReductionSendai, 15 March 2015
Olaf Neussner, arken consulting, Philippines
Page 2
Published by:Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH
Registered officesBonn and Eschborn, Germany
Internet: www.giz.de
Author: Olaf Neussner
Implemented byarken consultingAckerstr. 11B10115 BerlinGermany
Page 4
This means to Bangladeshis:
A. Storm categories 1, 2, 3.
B. Alert, Warning, Disaster stage.
C. Gale, Storm, Cyclone.
D. No swimming; No small boats; No big ships allowed in the
ocean.
Page 5
This means to Chinese:
A. “All clear”, no more danger.
B. Second alert stage.
C. Stop outdoor collective activities.
D. Wind gusts of scale 10 expected.
The other alert stages.
Page 6
This means to the people of Hong Kong:
A. The numbers in the storm categories refer to the Saffir Simpson Hurricane Scale.
B. There are 10 signal levels in Hong Kong, but only 5 are displayed.
C. Gale, Storm, Cyclone, Typhoon, Hurricane.
D. 1, 3, 8, 9, 10 are taken from the Beaufort Wind Scale.
Page 8
Alert levels should be the same for all hazards, because many different schemes are confusing.
Flood: 3 levels
Storm: 4 levels
Tsunami, volcano: 5 levels
(Philippines)
Same number of levels
(e.g. four)
Page 9
Alert levels should have the same colour scheme all over the world and it should reflect the most common usage of colours:
Green: go, ok, no problem
Yellow: attention, be alert
Orange: warning, prepare for action
Red: stop, danger, act
But it can involve additional colours for “all clear”.
Page 10
Alert levels should have the same symbols everywhere.
The ISO standards for tsunami danger zones, evacuation routes and centres could be an orientation.