Dramatic pictures have emerged from the scene of the tyre fire at Sherburn-in-Elmet.
Up to 15,000 tonnes of material, including tyres, caught light at the scene on Thursday morning.
Police today warned that the smoke plume may lower.
The fire at the recycling plant is under control and reducing in size and North Yorkshire Fire and Rescue Service and North Yorkshire Police remain at the scene.
Public Health England has reiterated its advice that people should stay away from the smoke.
Staying indoors provides protection from exposure to smoke, so residents should stay inside and keep doors and windows closed as much as possible.
Anyone who suffers from respiratory conditions, such as asthma, is advised to ensure they have taken any prescribed medication and keep it to hand.
If you are concerned about the effects of smoke on your health, telephone your GP or call 111 for advice.
Motorists who have to travel through any smoke should keep windows closed, turn off air conditioning and keep their air vents closed.
Officials from the Environment Agency, the Met Office and other agencies will continue to monitor the smoke plume as the fire continues to burn out, which could last for several more days.
Superintendent Andy McMillan of North Yorkshire Police, who is co-ordinating the multi-agency response, said: “Residents and people who work in the Sherburn in Elmet area can be assured that partner agencies are working very closely together to minimise the impact of the fire and to ensure that people are kept safe.
“With this type of situation, which can be hard to predict due to weather conditions, our advice is to stay alert, take precautions and stay indoors to avoid coming into contact with the smoke.
“If you or someone you know begins to feel unwell due to the possible effects of smoke, please seek medical attention immediately if you have health concerns.”