The National Weather Service has issued an excessive heat warning for much of the state for Thursday.
NBC 10's Gary Ley said feel-like temperatures will exceed 100 degrees. High humidity will create dangerously hot conditions. But on a positive note, a cold front will pass this weekend breaking the heat.
The Rhode Island Department of Environmental Management has issued an air quality alert for Thursday.
All regular RIPTA buses and trolleys, excluding special services, will be free.
The DEM is predicting air quality will reach unhealthful levels in southern Rhode Island Thursday afternoon.
The DEM said residents can reduce air pollution by limiting car travel and the use of lawn mowers and charcoal lighter fuels.
The state Department of Health said unhealthful levels of ozone can cause throat irritation, coughing, chest pain, shortness of breath, increased susceptibility to respiratory infection and aggravation of asthma and other respiratory ailments.
Limit outdoor exercise and strenuous activity and stay in an air-conditioned environment if possible during the afternoon and early evening hours, when ozone levels are highest.