State officials are warning residents in the Twin Counties to take the proper precautions today, as high temperatures and smoke from Eastern wildfires are wreaking havoc on air quality.

The combination of 90-degree heat and smoke from the Manteo wildfire, which began moving into the area Thursday night, could make breathing difficult this afternoon, said Tom Mather, a spokesman for the N.C. Department of Environment and Natural Resources.

Anyone with heart or lung conditions should stay inside as much as possible, Mather said, and everyone should avoid strenuous outdoor activities, he added. Young children and the elderly also should avoid prolonged exposure to outside air.

A strong upper level ridge, combined with a moist airmass will result in a heat index of up to 105 degrees this afternoon, forecasters are saying, and could lead to unhealthy ozone levels. As the mercury climbs, the increased heat from sunlight interacts with other pollutants, forming ozone pollution.

That alone would be cause for concern, Mather said. However, high levels of particulate pollution from the distant wildfire is creating a dual threat in the Twin Counties.

Particulate matter, also known as soot, includes a wide range of microscopic pollutants, such as road dust, diesel soot and wood smoke. The tiny irritants, which are breathed deep into the lungs, have been linked to major health problems, especially for those with respiratory conditions.

Although the National Weather Service said much of the smoke in this area dispersed around 9 this morning, particulate levels are above average in most of the eastern part of the state, Mather said.

The wildfire, covering an estimated 30,000 acres, is expected to continue spreading throughout the day. As the fires rage on, Gov. Mike Easley declared the area in a state of emergency around noon today.

A shift in wind could bring the heavy smoke, which last night prompted several Rocky Mount residents to dial 911, back in town later today.

"People just need to be aware of their surroundings," Mather said. "If anyone is having difficulty breathing, they should get inside, drink plenty of water and relax."