Mayor Bill de Blasio has declared a state of emergency in New York City after record rainfall, dpa reported."We're enduring an historic weather event tonight with record breaking rain across the city, brutal flooding and dangerous conditions on our roads," de Blasio tweeted late Wednesday. "If you're thinking of going outside, don't. Stay off the subways. Stay off the roads. Don't drive into these heavy waters," de Blasio cautioned. At least eight people died in flooding-related incidents as Hurricane Ida swept through New York City area, New York Times reported on Thursday.