The state Department of Environmental Protection has issued a code orange air quality alert in the region.
This means air pollution concentrations could affect sensitive groups such as children, the elderly, and people suffering from asthma, heart disease or other lung diseases.
Those affected are advised to avoid strenuous activity or exercise outdoors.
For those in Atlantic County, spokeswoman Linda Gilmore said, the county advises residents most susceptible to seek relief "air conditioned facilities, including county libraries and senior centers. Locations and hours for all are available at www.aclink.org as well as information and resources for heat-related illness."
Check back for updates.