Nicholas could strengthen into a hurricane before making landfall Monday. The storm will trigger "considerable flash and urban flooding," the National Hurricane Center says.
The rapidly expanding storm struck Western Cuba and is expected to hit Louisiana on Sunday as a major hurricane.
The wet season in the Philippines typically starts in June and lasts until November.
There's only been one other year – 2005 – that Greek names have been needed. The National Hurricane Center on Friday announced storms called Alpha and Beta have formed in the Atlantic.
Heavy rainfall and life-threatening flash flooding continue after Tropical Storm Hanna hit South Texas. Meanwhile, Hurricane Douglas is closing in on the islands of Hawaii.
A tropical storm will bring gusty winds to the area, threatening the stability of two towering cranes that remain unstable following last weekend's disaster.
The storm prompted the National Hurricane Center to issue warnings for Puerto Rico, the U.S. Virgin Islands, and the British Virgin Islands.
Houston, Galveston and other parts of eastern Texas have been warned that isolated rain totals of 20 to 25 inches are possible through Friday.