When the temperatures rise as high as they're expected to this week, it can be especially dangerous.
One heat-related death was reported in Lexington over the weekend.
5-month-old Holland Judy died Sunday after being left inside a hot car on Saturday.
As police continue to investigate her death, doctors are urging people to take caution when dealing with the heat.
The coroner ruled the cause of Judy's death as hyperthermia.
No charges have been filed against the baby's mother, but the Crimes Against Children Unit is investigating.
Medical professionals are using the baby's death as an opportunity to remind people that children and the elderly need extra attention in sweltering temperatures.
"They don't have cooling mechanisms," Dr. Richard Ramirez, of the Urgent Treatment Center said. "So it's important they are in a cool place and hydrated."
Dr. Ramirez says people should especially be careful in closed quarters. He says it can take as little as 10 or 15 minutes for the heat to become dangerous for anyone.