Adapting to the climate in Cuba

I left yesterday from Havana and the week prior was one of the hottest and most humid temperatures that I have ever experienced in Cuba. I am well used to the hot weather, being a frequent visitor to Malaysia and SE Asia. I really don't think that Europeans would like to be in Cuba, especially in Havana during this period, unless of course you are in an air conditioned hotel by the sea. There is hardly any way to protect yourself: you can shield yourself with umbrella, cover your head, wear sunglasses, very light clothes, change clothes often, drink a lot of water. Most tourist hotels and cafes have air conditioning but private and government spaces often do not have.
Before coming to Cuba during the summer months, unless you are coming as a tourist, be prepared to the onslaught of this weather. The temperature do not quite reach 40 C or 100 F but the humidity and sweating are the problems.
I am a great supporter of Cuba and its revolution, but I must say I enjoyed the cool air of Miami on my way to Europe where the heat is rather pleasant by Cuban standards

The difference between the weather in Miami and Havana is just a few degrees as the Tropic of Cancer divides the cities between the beginnings of the tropics from the sub tropics, Miami being more humid than Havana. 
There are several fundamental differences between these cities, Miami summers are also fiercely hot but, the city relies heavily on superficial climatic apparatuses, air conditioners, making it seem more tolerable but, without air conditioners, Miami would be hotter than Havana, the city was built in a swamp area, many if it’s high rises block the sea air and most of the city is not design for pedestrian traffic, if you walk in Miami under the summer sun, you get literally fried.
Havana’s commercial hub before 1959 was “Havana Centre” This was the area where most Havanans and tourists would go shopping, dining, sit at a cafe, visit beauty parlours etc. In its hay days (late 1700’s until 1959) you could walk for hours under columned porches away from the sun, the streets in this area were constructed ending at the sea boulevard to take advantage of the breezes coming from the sea. Today, great areas and main streets of this part of the city are not very visited, due the devastation caused by communism, the revolution’s terrible negligence and destruction of most of its businesses,  although, I am happy to report that they are on their way to recuperation by the city historian and private enterprises.
Other areas like El Vedado do not offer some of these advantages, construction here, which started around the mid 1800’s, was very suburban in style and its more modern avenues (1900 to 1959) have a more North American concept with many high rises, condos and mansions from before 1960, at the time, acclimatization apparatuses were plentiful and readily available in Cuba but, after 1959, many of them started to brake and could not be replaced for many years.  Recently, businesses, hotels, condominiums and private homes have seen a resurgence in acclimatization as the commercial embargo has been somewhat  eased and better apparatuses and central air conditioners have reappeared in Cuba lately.
I would say that Havana is a city that can rely on both, nature and air conditioners but, all things considered, summers in Cuba are hot, it is not for every tourist, it is good to take advantage of some tropical summer activities such as going to the beaches, national parks and the like, the waters are spectacularly warm and inviting but, Havana is really not a beach city, its activities are varied and they are best enjoed in the winter time.