In the summer months, garages and outdoor dog houses are a heat trap which can be fatal for your dog. If the pavement is too hot for your bare feet then it is also for your pups paws too. Truck beds provide no protection from the sun and heighten the chances for heatstroke for your dog or humans. It can also severely burn his paws. 100,000 dogs are killed each year due to riding in the back of pickups.
Black dogs are more susceptible to the heat.
Newfoundlands drink alot of water. Make sure their water bowl always has fresh water. Change their water frequently. Wash their food bowls after each time they eat. You wouldn't want to eat from a dirty plate.