Westchester County is stepping up its efforts to control the mosquito population and stop the spread of Zika.

County Executive Rob Astorino unveiled a new action plan at Kensico Dam Plaza to target the insects.

The county has doubled its mosquito traps from last year so the insects can be tested for the Zika virus.

The mosquito-borne virus has been has been linked to birth defects and other ailments.

At least four people in Westchester County and the Hudson Valley have tested positive for Zika. All of the cases were contracted outside of the United States.

If a case of Zika is confirmed in the area, targeted spraying will be used near that location. As part of a pre-emptive attack, the county is also applying larvacide to catch basins and county roads where mosquitoes breed.

Astorino says to truly stop mosquito breeding, the public needs to get involved.

"The biggest threat is have a little breeding ground in your own yard and you don't take care of it. There's not a lot we can do to prevent that. But there's a lot you can do to prevent it, and that's just cleaning out the water that's been standing still for a long time," he says.

The county is also continuing to hand out free minnows at Westchester County Airport. The minnows can eat mosquitoes in standing water.