Severe weather causes thousands of flight cancellations across US.

More than 1,600 flights have been canceled and nearly 5,800 more have been delayed due to strong weather moving through the Northeast, especially around New York. The Federal Aviation Administration warned that flying in the New York metro area could be a little more chaotic this summer with fewer air traffic controllers available to handle flights than needed. Several airlines have issued waivers for passengers in affected cities to rebook their itineraries. To avoid similar headaches, travelers are advised to travel early, avoid connections if possible, and consider buying travel insurance.