USA TODAY: Josh Rivera – The summer of air travel woes continues Tuesday with delays and cancellations largely due to weather issues in the Northeast. 

As of 6:4pm ET more than 800 flights within the US were cancelled and more than 3,500 others were delayed, according to flight-tracking website FlightAware.

US cancellations are largely driven by Southwest Airlines, which canceled 169 (or 4% of flights); American Airlines, which canceled 47 (or 1% of flights); and United Airlines, which canceled 43 (or 1% of its schedule).

Although many parts of the country are experiencing deadly heat waves, in the Northeast a large pocket of warm and humid air collides with an approaching cold front creating a storm. 

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What happens if my flight is cancelled due to weather?

Some airlines have been rolling out weather waivers that allow affected passengers to change their flights without penalty.

► Southwest Airlines issued a travel advisory for any customers looking to “rebook in the original class of service or travel standby” at no additional charge. The advisory states that it must be within 14 days of their original date of travel.

► American Airlines also issued a travel waiver Monday, noting that changes must be made by Wednesday. 

► United Airlines issued a “severe weather” waiver for customers flying Tuesday and Wednesday from a host of Northeast airports. The airline is waiving the change fee and any difference in fare for flights departing on or before September 5.

Will flyers get help?

The U.S. Department of Transportation is creating an interactive dashboard where travelers will be able to find “easy to-read, comparative summary information on the services or amenities that each of the large U.S. airlines provide when the cause of a cancelation or delay was due to circumstances within the airline’s control,” according to a letter Transportation Secretary Pete Buttigieg sent to all US airlines.

Existing Transportation Department rules require airlines to offer customers refunds if their flights are canceled for any reason, but policies on delays can be opaque, even though the information is required to be part of federally mandated Customer Service Plans.

The consumer dashboard is expected to be live on the department’s Aviation Consumer Protection website by Friday, ahead of Labor Day weekend.

Contributing: Eve Chen, USA TODAY