Iran and the U.S. trade strikes for a 10th straight day with no sign of backing down. Plus, Tropical Storm Bertha closes in on the Gulf Coast, and flooding could become the biggest threat. If these tariffs proceed, Canada should respond tariff for tariff, dollar for dollar. Tropical Storm Bertha zeroes in on Gulf Coast, threatening flooding rainsTropical Storm Bertha, the second named storm of the Atlantic hurricane season, heads toward the Gulf Coast, bringing the threat of heavy rain, storm surge and flash flooding. A tropical storm warning extends from the Florida-Alabama state line to parts of southeast Louisiana, with tropical storm watches also posted along the Gulf Coast.