  Emergency managers receive communication training about the importance of
being 'first, right and credible', and taking into account the psychology of
their audience and their particular reasoning under stress and risk. But we
believe that citizens should be similarly trained about how to deal with risk
communication. In particular, such messages necessarily carry a part of
uncertainty since most natural risks are difficult to accurately forecast ahead
of time. Yet, citizens should keep trusting the emergency communicators even
after they made forecasting errors in the past.
  We have designed a serious game called Vigiflood, based on a real case study
of flash floods hitting the South West of France in October 2018. In this game,
the user changes perspective by taking the role of an emergency communicator,
having to set the level of vigilance to alert the population, based on
uncertain clues. Our hypothesis is that this change of perspective can improve
the player's awareness and response to future flood vigilance announcements. We
evaluated this game through an online survey where people were asked to answer
a questionnaire about flood risk awareness and behavioural intentions before
and after playing the game, in order to assess its impact.
