Description : PANAMA CITY CARNIVAL. Panama City celebrates the carnival by closing main arteries of the city for parades and the traditional "mojadera" (people throw water at each other) which is a characteristic of every carnival celebration throughout the country. Eighteen-wheelers with water tanks show up and pump water out of it to throw it at the crowds celebrating the parades. This, you might think, is weird but if you attend this carnival, you will soon find out that it is actually nice because Panama is hot and the carnival takes place during the summer ( dry season in Panama takes place in February. Panama.