Google has created a New York specific Crisis Response map for Hurricane Sandy.
Hurricane Sandy: NYC features layers to display evacuation zones, open shelters, weather information and live webcams. The map also includes a storm surge layer that shows the probability of a storm surge over six feet in the city.
The Google Crisis Response page also includes a number of useful links, incuding to New York City's official emergency notification system and the National Hurricane Center advisories.
You can easily share and embed this map on your website by clicking the "Share" button at the top right hand corner of the map and grabbing the embed code.