The heat warning in the Ottawa Valley continues through Thursday. High humidex values have the potential to cause dehydration, heat exhaustion, heatstroke, and on occasion, death. Young children, pregnant women, and the elderly are particularly at risk- as are those working outdoors. The best advice is to stay inside and draw your drapes to block direct sunlight. Drink plenty of water. Residents should check with the elderly and infirm relatives and friends to see how they are faring. Tips on coping with the heat are found on the Health Canada website. Showers and lower temperatures are anticipated Friday.