Here are some steps you can take to help your dog if they have water in their lungs and you can't get to a vet immediately:
1. Stay calm and try to keep your dog calm: Your dog may be distressed and anxious, so it's important to try to stay calm yourself and reassure your dog.
2. Assess your dog's condition: Look for signs of respiratory distress, such as difficulty breathing, gasping for air, or rapid breathing. If your dog is having difficulty breathing, try to clear their airway of any obstructions.
3. Place your dog in an elevated position: This can help to improve their breathing and make it easier for them to expel water from their lungs.
4. Give your dog oxygen: If you have access to an oxygen tank or mask, you can provide your dog with oxygen. This can help to improve their oxygen levels and reduce the strain on their lungs.
5. Apply heat: Gently apply heat to your dog's chest and neck. This can help to relax the airways and make it easier for your dog to expel water from their lungs.
6. Encourage your dog to drink water: If your dog is able to drink, encourage them to drink small amounts of water. This can help to thin the fluid in their lungs and make it easier to expel.
It is important to note that these steps are not a substitute for professional veterinary care. If your dog is in distress, it is essential to seek immediate medical attention. If your dog is able to breathe, you can try these steps to help relieve their symptoms, but you should still contact a vet as soon as possible.