Forecasters have been predicting a Heat Index value of 101 on Thursday and Friday.
"The Heat Index is the temperature that the body feels when the effects of the heat and humidity are combined," said Priscilla Smith, of the American Red Cross's First Capital District Chapter.
She added that exposure to direct sunlight can increase the heat index by as much as 15 degrees, and that it's important to know the difference between a heat watch, warning, and advisory.
The following are definitions provided by the American Red Cross:
Excessive Heat Watch - Conditions are favorable for an excessive heat event to meet or exceed local Excessive Heat Warning criteria in the next 24 to 72 hours.
Excessive Heat Warning - Heat Index values are forecast to meet or exceed locally defined warning criteria for at least 2 days (daytime highs =105-110).
Heat Advisory - Heat Index values are forecast to meet locally defined advisory criteria for 1 to 2 days (daytime highs=100-105 degrees Fahrenheit).
According to the American Red Cross, excessive heat has caused more deaths than all other weather events in recent years.
For tips on how to prepare for excessive heat, click here.