If so, how might it look? The Tisha B'Av 'season' is three weeks and the timing is set by the Jewish lunar calendar relating to the anniversaries of the destruction of the Temple (on the ninth of the month of Av). It often takes in Hiroshima day (6 August) and that seems to be one of the things that a number of Jewish people fold into their observance of the season. So maybe the thing to do would be to take in the dropping of the nuclear bombs the 2nd being at Nagasaki on 9 August, and perhaps taking a week or two before that with, therefore, the Feast of the Transfiguration also on 6th. So end of July to start. Perhaps Mary Magdalene's feast day on 22 might be a good starting point -the story of her taking spices to anoint Jesus' body and also witnessing the resurrection are good starting points for considering 'calamitous' events? She's often associated with the woman who anointed Jesus' feet "for his burial" too ...
So I'm not proposing to change Sunday readings or anything at this point but to keep the days in between as times of reflection, prayer and repentance regarding human-made calamities affecting the cosmic Temple that is the Earth.