A tropical depression is weaker than a storm. Big storms bring strong wind, big waves and very heavy rain. At sea, big waves usually come from September to March.
For a storm that is coming now, read the national weather service at nchmf.gov.vn. Life of Da Nang uses its bulletins for the weather in the weekly edition.
When a storm is coming, keep some cash at home, because card machines may stop working when the power goes. Leave the bike at home on the bad days and take a taxi or a Grab car.