Public Health Sudbury and Districts says the current heat warning that began June 29 has been extended. “Heat warnings are extended while the weather stays at 29 degrees Celsius or above during the day and 18 degrees Celsius or above at night, or the humidex reaches 36 or above,” the health unit said in a news release July 3. “Frequently check on your friends, neighbours, and relatives, especially if they are at higher risk of heat-related illness to ensure that they are staying cool and hydrated,” said Burgess Hawkins, Public Health Sudbury and Districts’ Health Protection Division. The health unit says the heat warning has been extended for the following locations: Symptoms of heat-related illness according to the health unit include dizziness or fainting, nausea or vomiting, headache, rapid breathing and a fast heartbeat, extreme thirst, confusion, and less urination with unusually dark yellow urine.