Tropical Storm Harvey is on its way to making landfall again. The storm was hugging the coast Tuesday morning, around 77 miles from Galveston, Texas. The storm is expected to make landfall again at the Texas-Louisiana border by Wednesday afternoon.Bands of heavy rain from the storm have dropped more than 30 inches of rainfall in the Houston area. The heavy rain has also started in Louisiana and will likely continue through the storm. Another 15-25 inches of rain could fall through Friday in the Houston area. For context, so far about 15 trillion gallons of water has fallen on Houston. The most recent predictions put total rainfall at 20-25 trillion gallons by the time the rain ends.State and local officials have been monitoring the severe weather potential since last week before Harvey made landfall in Texas. While the storm is not forecast to move into southwest Louisiana, rain bands from Harvey are reaching parts of the metro.One large cluster of heavy rain was moving into southeast Louisiana from the Gulf of Mexico. The foreboding images of the incoming storm bands from Harvey were lighting up weather radar screens early Tuesday, the 12th anniversary of the day Hurricane Katrina made landfall in Plaquemines Parish on Aug. 29, 2005.The National Weather Service has issued a flash flood watch for all of southeast Louisiana, southwest Mississippi and the Mississippi Gulf Coast through Thursday. Forecasters said up to 8 inches of rain will be possible through Thursday, with higher amounts possible. There is also the threat of isolated tornadoes near the coast.In New Orleans, city officials have been making preparations to support the diminished pumping system, which is still plagued by pumps and turbines that are out of service. Flooding was reported Monday afternoon in some parts of the city after a storm moved through. Officials have placed barricades around the city and are warning residents and motorists to be cautious around flooded areas.Gov. John Bel Edwards said potential flooding from Harvey's torrential rains poses a "dangerous situation," but the state hasn't received any reports yet of flood-damaged homes. He said Louisiana has offered to take in evacuees from Texas and to offer them shelter.