Louisville, Ky. (WHAS)--A heat advisory is in affect for half of Kentuckiana and an air quality alert has been issued for all of Kentuckiana.
Thursday is expected to be the hottest day of the summer as temps are expected to be in upper 90's with a heat index of 110 degrees.
With this type of heat it can be very dangerous for those who work outside, the elderly and the very young to be outside.
Emergency rooms around the Louisville area have already reported an increase of patients treated for heat-related illnesses.
Dr. Tara Odle, Norton-Brownsboro Hospital, said heat exhaustion is the illness that has kept them busy for the past couple of weeks.
"They [patients] come in feeling light headed, they may have passed out, having headaches and we have had a couple people come in and say 'I was sweating but then I stopped sweating,' so, that was one thing that was a trigger for one of the gentlemen to come in," Odle said.
She also said she has seen and increase in the number of patients with kidney stones and dehydration is a trigger for the medical condition.
"Also people, in the summer, when they don't stay hydrated tend to be more predisposed to kidney stones. That is something else that you don't think of as a heat related illness," Odle said.
Doctors offered a few tips to help keep you safe in the dangerous heat:
Drink plenty of water throughout the day
Limit your outdoor activities
Avoid alcohol and caffeinated drinks if you are going to be outside for an extended period
Do not leave children or pets inside hot vehicles for any period of time