Urgent　or　critical　situations,　such　as　terrorist　attacks　and　natural　disasters,　often　require　decision　makers　(DMs)　to　take　crucial　decisions.　Emergency　decision　making　(EDM)　problems　have　become　a　very　active　research　field　in　recent　years.　The　existing　studies　focus　mainly　on　the　information　inadequacy　or　incomplete　information　in　emergencies,　and　selecting　ideal　emergency　alternatives,　neglecting　the　psychological　behavior　of　DMs　under　emergencies.　Few　studies　consider　a　DM＇s　psychological　behavior,　although　there　is　some　focus　on　the　dynamic　features　of　emergency　events　and　limited　DM　judgments　under　risk　and　uncertainty.　Motivated　by　such　problems,　this　study　proposes　a　prospect　theory-based　interval　dynamic　reference　point　method　for　EDM.　The　technique　for　order　preference　by　similarity　to　ideal　solution　(TOPSIS)　method　is　a　popular　decision　technique,　as　decision　makers　are　always　bounded　rational　under　risk　and　uncertainty　and　their　psychological　behavior　plays　an　important　role　in　EDM.　However,　the　existing　TOPSIS　methods　are　seldom　concerned　with　this　issue.　Based　on　such　a　problem,　this　study　proposes　a　TOPSIS　method　with　an　interval　reference　point,　which　considers　the　DM＇s　psychological　behavior.　Two　examples　are　presented　to　illustrate　the　feasibility　and　validity　of　the　proposed　methods　for　solving　EDM　problems　in　the　real　world.　Based　on　the　final　rankings　of　alternatives　in　the　examples,　each　of　our　methods　validates　the　other　and　matches　the　actual　EDM.　(C)　2015　Elsevier　Ltd.　All　rights　reserved.