As Brock’s only refrigeration mechanic, Rob Glass has been one of the busiest men on campus this week. Air conditioning for about 80 per cent of the campus is controlled by two large chillers in Facilities Management’s Central Utilities Building. Combined, the chillers are the equivalent of about 2,000 air conditioning units.The following is information from Niagara Region Public Health on how to protect yourself during excessive heat alerts: Schedule outdoor activities carefully. If you must be outside, plan your activities either before noon or in the evening. Rest frequently in shady areas. Drinking plenty of fluids, unless fluid is restricted by one’s physician. Infants, children, the elderly, people with high blood pressure, people with heart and/or respiratory problems and those who work or exercise outdoors are at possible risk of developing heat-related illness. Heat-related illness occurs in three stages: heat cramps, heat exhaustion and heat stroke. A person with heat stroke may feel confusion, dizziness, nausea, muscle swelling, heart disturbances and/or a headache. Other symptoms include seizure, unconsciousness and/or coma. Seek immediate medical attention for heat stroke.The public is encouraged to call or visit friends and neighbours whose health is at risk due to the hot weather.