A heat advisory has been issued for south Louisiana through 7 p.m. Tuesday.

The combination of high temperatures in the mid- to upper 90s and high humidity levels will result in heat index values between 105 and 110 degrees in the Baton Rouge and New Orleans areas, the National Weather Service said.

At that heat index level, people need to take precautions during outdoor activities against sunstroke, muscle cramps or heat exhaustion. People should drink more nonalcoholic fluids, take frequent breaks in activities and rest in shady areas when possible, according to the Centers for Disease Control and Prevention.

Heat index is how hot it feels outside when temperature and humidity are combined.

The next several days could bring similar conditions, the National Weather Service said.