As always when leaving your pet home alone for longer periods of time keep in mind what the temperature can rise or fall too.
Now with summer approaching you want to always keep in mind that your pet can't open the refrigerator while your gone (actually some can but they can't pour a drink) so leave plenty of fresh water. If necessary leave the window slightly open from the top to keep air circulating.
Dogs can't sweat so it's easy for them over heat in warm weather even if it's not extreme. This is why they pant, the heavy breathing cools the blood in their tongues allowing for cool blood to circulate their bodies. Alleviate the heat by keeping them well groomed if the coat is long cut it short during the summer. Brush their fur frequently to help get rid of excess fur and to help them shed their winter coats .
Remember to execute common sense. Never Leave a dog or any pet in a car if your not going to be in the vehicle. Not even for a second. The temperature in a car can spike to dangerous levels very quickly and your pet can have a heat stroke and this could result in death.
The spring time and summer can bring many wonderful adventures for you and your pet. Many opportunities to enjoy time together. Just make sure that you take the appropriate steps so that this time together is not spent in the animal clinic emergency room.