Stopping
      one’s prayer in cases of necessity
Question

                Is
      it permissible to stop one’s prayer if the warning siren goes off in the
      case of an accident?
Praise be to Allah.If
      the accident is major and serious, then it is OK to stop one’s prayer;
      if it is a minor incident that can be dealt with after completing the
      prayer, then it is not permissible. The scholars said: it is obligatory to
      stop one's prayer in order to save a negligent person from a fatal
      accident. For example, if you are praying and you see a snake approaching
      a man who is sitting down and has not noticed it. If it is heading for
      him, you have to stop your prayer and tell him so that he will not be
      bitten, possibly fatally. Or if you see a blind man walking in front of
      you whilst you are praying, and he is heading towards a well, and you are
      afraid that he may fall into it, then you have to stop your prayer and
      save him from that fatal accident, even if this means stopping your
      prayer. The same applies in cases of fire, etc. 
      
      
      But
      if the siren goes off for a minor matter which can be dealt with after
      completing the prayer and it will not be too late if you complete the
      prayer first, then it is not permissible to stop your prayer before you
      have completed it, because this accident can be dealt with after
      completing the prayer, without anyone coming to further harm. And Allaah
      knows best.