The feds say the worst flu season in a decade is growing even more dangerous as the nasty virus spreads across the country like a plague of locusts devastating crops from coast to coast.

The Centers for Disease Control and Prevention said Friday that the flu season continued to intensify last week — and New York has been hit hard.

One of every 14 visits to doctors and clinics nationwide were for symptoms of the flu — the highest level since the deadly swine flu pandemic in 2009.

Last week, 42 states reported high patient traffic for the flu, up from 39. Hospital stays because of the flu were also up.

Experts had thought this season might be bad, but its intensity has surprised most everyone because the flu usually peaks in February.

In New York, the flu has been categorized as “widespread” for the eighth consecutive week, according to the state Health Department.

In the week ending Jan. 27, there were 11,683 laboratory-confirmed influenza reports in the state, a 50 percent increase over last week.

And the number of patients hospitalized with laboratory-confirmed influenza was 2,221, a 21 percent increase over last week.

In the Big Apple, 3,015 people have been hospitalized since the season began in October, 33 percent more than at this time last year.