During heat waves, it is important to check on at-risk individuals and ensure they are staying hydrated, keeping cool, and have support if needed. Signs of heat-related illnesses like dehydration, heat cramps, heat exhaustion, and heat stroke should be watched for, and first aid provided which may include cooling the person, giving fluids, and calling for emergency help. Fires are a risk during heat waves due to high temperatures and low humidity, and precautions should be taken. Drowning is also a hazard as more people spend time in water to cool off. Power cuts may occur due to infrastructure issues, so people should be prepared with emergency supplies.