[contentcards url=”https://www.wsj.com/articles/southern-ukrainian-towns-inundated-as-floodwaters-from-burst-dam-rise-7b5e3424?mod=hp_lead_pos1″ target=”_blank”] By Matthew Luxmoore and Isabel Coles Destruction of the dam compounds humanitarian tragedy on top of the war KHERSON, Ukraine—Floodwaters continued to rise…