Emergency Management

Nantucket Alerts

CivicReady is a communication service that sends immediate alerts to Nantucket's residents who are subscribed to the system.

All users will have the ability to customize their notification preferences after signing up. Alerts can be sent via email, text, and/or phone call so you never miss important communication about an emergency event in the area. We will contact you through CivicReady in the event of an emergency or other routine events based on your subscription preferences.

Nantucket Alerts! (sign up here)

Hurricane Season

The Atlantic hurricane season runs from June 1st to November 30th, The Atlantic basin includes the Atlantic Ocean, Caribbean Sea, and Gulf of Mexico.

Tropical cyclone: A rotating, organized system of clouds and thunderstorms that originates over tropical or subtropical waters and has a closed low-level circulation. Tropical cyclones rotate counterclockwise in the Northern Hemisphere. They are classified as follows:

Tropical Depression: A tropical cyclone with maximum sustained winds of 38 mph (33 knots) or less.
Tropical Storm: A tropical cyclone with maximum sustained winds of 39 to 73 mph (34 to 63 knots).
Hurricane: A tropical cyclone with maximum sustained winds of 74 mph (64 knots) or higher. In the western North Pacific, hurricanes are called typhoons; similar storms in the Indian Ocean and South Pacific Ocean are called cyclones.

Major Hurricane: A tropical cyclone with maximum sustained winds of 111 mph (96 knots) or higher, corresponding to a Category 3, 4 or 5 on the Saffir-Simpson Hurricane Wind Scale.

2021 Hurricane Outlook

NOAA’s Climate Prediction Center is predicting another above-normal Atlantic hurricane season. Forecasters predict a 60% chance of an above-normal season, a 30% chance of a near-normal season, and a 10% chance of a below-normal season. However, experts do not anticipate the historic level of storm activity seen in 2020.