 Heat is serious. When you look at the thermometer and you see it's 90 degrees outside, the thermometer only tells one part of the story. The majority of the heat responses that we've had so far this summer are because the heat index, the combination of the temperature and the humidity, has been very very high, 110, 111 or higher in some cases. So we really encourage people, if you do not need to go outside, don't. If you are going to go outside, pre-hydrate. If you've waited until you start getting thirsty when you're out in the community, it's too late. You're behind the eight ball. So typically we recommend at least a day or two ahead of time. So if it's Thursday and you know you're going to be out and about on Saturday, start tanking up today. Signs and symptoms of a heat-related emergency, profuse sweating, nausea, vomiting, dizziness, muscle cramps. Those are signs that your body's telling you to move into a cool environment. Take a break.