New Scientist (21 April 2012)
writes that strong warnings have proven to be effective in saving lives during
America’s tornado season.
During the 2011 tornado season
in America’s Midwest, the National Weather Service (NWS) found the residents
waited for visible signs of the threat before responding. In other words, they
didn’t believe the warnings until they saw the destruction. Tornado warnings in
the past used the following communications: “You should activate your tornado
action plan and take protective action now.”
In the first half of April
(i.e. in the past two weeks), there have been over 100 tornadoes in the US
Midwest, which has been the most severe tornado strike this year. However, the
death toll of 6 people has been very low compared with other years. This
appears to be a result of the change in disaster warning communications.
After research about how
people respond to warnings, the National Weather Service in America tried new
warnings this year. In Kansas this year, residents were given the following
warning: “Mass destruction is highly likely, making the area unrecognizable to
survivors.” It proved to be effective as most people left the tornado-affected
areas in time, and quite possibly saved lives.
The new disaster warning
message evoked images of the destruction and the tornado’s potential
consequences. However, the NWS acknowledges the possibility that the message
with “dull” with time as people become immune to its message. Therefore the disaster
warning messages will be monitored during further storms for the remainder of
the year. But for the time being, strong warnings have been justified.
(www.newscientist.com)
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