A tornado alert currently covers New York City recently. The US National Weather Service raised it to a warning level across the area. Storms are due by the weekend and likely to worsen. Heavy rain and strong winds will sweep across the area shortly. Roads may become flooded in several districts. Water could accumulate in low spots under pressure. Air over the city is thick and cloudy, reducing visibility. People should watch official updates on radio. They also need to prepare emergency kits in case the power goes out during storms.