Tropical revolving storms occur in every area of the world, affecting both the richest and poorest countries. The effects of such storms can be devastating to even the richest and most developed countries; however it is often the case that poorer countries are affected most adversely by tropical revolving storms in both humanitarian and economic terms. For example, whilst tropical storms in highly developed countries such as Hurricane Katrina is the USA caused substantial damage, the effect of Cyclone Nargis on the less economically developed Myanmar was arguably far greater.
Warning systems and communication often play an important role in mitigating the effects of tropical storms as they allow preparations such as evacuation to take place before the storm hits which saves many lives, and in this respect developed countries are at a distinct advantage as they possess the most recent and effective technology to best predict the movements of tropical storms whereas in less developed countries prediction is more limited. Due to accurate predictions by scientists and effective warning and communications systems, over 80% of the 1.3 million people in the mandatory evacuation zone in New Orleans were evacuated prior to the impact of Hurricane Katrina in 2005, which is a fairly high percentage and shows a strong initial response to the impending storm. However, New Orleans Mayor Ray Nagin and Louisiana Governor Kathleen Blanco came under intense scrutiny for their failure to cooperate. Nagin ordered the emergency evacuation of parts of New Orleans only 19 hours before the storm reached the city, despite being recommended to do so earlier by federal government. Similarly, before the arrival of Typhoon Haiyan in Southeast Asia in 2013 there was a large scale evacuation with over 800,000 people being evacuated in the Philippines due to the state of