DUBAI, United Arab Emirates — U.S. President Donald Trump on Monday threatened widespread destruction of Iran’s energy resources and other vital infrastructure, including desalination plants, if a deal to end the war is not reached “shortly.” Tehran meanwhile struck a key water and electrical plant in Kuwait, and an oil refinery in Israel came under attack. Israel and the U.S. launched a new wave of strikes on Iran, as the war raged with no end in sight. Trump’s new threat in a social media post and earlier comments in an interview...