Tropical Storm Nicholas soaks Houston area as it crawls towards Louisiana

The slow-moving system has knocked out power to half a million home, drenching Texas area hit by Hurricane Harvey in 2017

Tropical Storm Nicholas slowed to a crawl over the Houston area on Tuesday after making landfall as a hurricane, knocking out power to a half-million homes and businesses and dumping more than a foot of rain along an area swamped by Hurricane Harvey in 2017.

Nicholas could stall over storm-battered Louisiana and bring life-threatening floods across the deep south over the coming days, forecasters said.