A massive storm drenching the Gulf Coast is just one of three potentially dangerous weather systems we're following this morning. President Trump announced on Twitter this morning that he is "substantially increasing sanctions" on Iran after the attack that heavily damaged two Saudi Arabian oil facilities. The State Department posted a new advisory overnight, warning Americans traveling to Saudi Arabia to "exercise increased caution." Elsewhere in the Middle East, the political fate of Israel's long-serving Prime Minister Benjamin Netanyahu is uncertain this morning. A prominent Democratic donor is accused of running a drug den out of his southern California home. The deadly shooting of three Georgia teenagers is being investigated as a potential "stand your ground" case. We are learning new details about the first in a series of investigations into Boeing's troubled 737 Max jet.