It's been a hot summer so far. Much of the U.S. just experienced a heat wave this past weekend, and there's still ample time for another one before the season ends. 

Summer heat can get deadly very quickly. It's important to stay vigilant and safe, especially if your summer fun tends to take place outdoors. 

The Red Cross has 10 essential tips for staying safe in the hot summer sun. 

Never leave children or pets alone in the car. Temperatures can get deadly fast without the air conditioner running.  Stay hydrated. Drink water frequently throughout the day, and avoid caffeine and alcohol.  Check on you family, friends and neighbors who are especially vulnerable to the heat. Those over 65, children, infant, those who work outside and those with chronic illnesses are at risk.  If you don't have air conditioning, head to a school, library, mall, coffee shop or any other public space to cool off during the hottest parts of the day.  Avoid extreme temperature changes.  Wear loose, lightweight clothing. Wear light colors as well — dark colors absorb sunlight.  Avoid exercising and other strenuous activities during the day. Keep runs and other outdoor activities to dawn or dusk. Speaking of, postpone outdoor games and activities during extreme heat.  Take a buddy and take frequent breaks if you have to work outdoors.  Check on your animals often and make sure they have cool water and shade available. Bring them inside if possible during the hottest parts of the day. Here's how to treat your dog if he's showing signs of a heat stroke. 

More from GateHouse Media: 

Five tips to help you keep your cool while hiking on a hot summer day How to keep your dogs safe in summer heat 10 tips for staying cool while running in the summer