AVON-BY-THE-SEA - The heat is on in New Jersey, and its only going to get worse. The most dangerous temperatures are still on the way for the Garden State.

Temperatures are expected to hover near the 100-degree mark tomorrow. The National Weather Service has already issued an air quality alert for most of New Jersey.

Experts say physical activity should be limited to early morning and night during periods of extreme heat. Getting a jump start on a tan may seem like a good idea, but it's best to stay out of the sun to help avoid heat stroke or heat exhaustion.

The CDC offers these additional tips to stay safe during dangerously hot weather:

- Drink more (non-alcoholic) fluids regardless of your activity level. - Avoid sugar. - Wear lightweight, light-colored, loose-fitting clothing, including a wide-brimmed hat. - Wear sunscreen. - NEVER leave anyone or a pet in a closed, parked vehicle.

Those at greater risk of heat-related illness are:

- Infants and young children - People 65 or older - People who are physically ill, especially those with heart disease or high blood pressure.