The impact of climate change on tropical storms

Climate change is influencing the behaviour of tropical storms through rising global sea surface temperatures. Since the early 20th century, these temperatures have increased by over 1°C and are projected to rise further. This warming trend could significantly alter the characteristics of tropical storms, although exact predictions remain challenging.

Changes in frequency, distribution, and intensity of tropical storms

Rising ocean temperatures due to climate change are expected to affect tropical storms in several key ways. These changes relate to how often storms occur, where they form, and how powerful they become.

Effects of warming oceans on tropical storms

• Frequency of storms - With oceans remaining at or above 27°C for extended periods each year, the window for tropical storm formation widens. This could lead to an increase in the number of storms annually.
• Distribution of storms - As average ocean temperatures climb, more regions of the world's oceans may exceed the critical 27°C threshold. This could result in tropical storms forming in previously unaffected areas, such as at higher latitudes.
• Intensity of storms - Higher sea surface temperatures drive greater evaporation and cloud formation, releasing more energy during storm development. This is likely to make storms more powerful.

Strategies for predicting and monitoring tropical storms

Tools and benefits of storm prediction

• Monitoring technologies - Tropical storms are tracked using radar systems, satellites, and aircraft. These tools provide data on storm development and movement.
• Computer modelling - Computer models calculate the likely path of a storm, aiding in timely warnings and preparations.
• Early evacuation - Accurate predictions allow authorities to identify at-risk areas and evacuate residents before a storm hits, protecting lives and property.

Planning measures to reduce the effects of tropical storms

Key planning approaches for storm preparedness

• Avoiding high-risk areas - New developments, such as housing projects, can be steered away from vulnerable locations like low-lying coastal regions.
• Evacuation route planning - Authorities can establish clear evacuation routes to facilitate quick and safe movement of people away from danger zones.
• Emergency service drills - Regular training exercises, such as flood rescue simulations, ensure that emergency teams are well-prepared to respond effectively.

Protective actions to mitigate tropical storm impacts

Methods to protect against tropical storms

• Storm-resistant buildings - Structures can be engineered to endure high winds and heavy rain, with features like stilts to avoid floodwater damage.
• Flood defence systems - Constructing barriers such as levees along rivers and sea walls along coastlines helps prevent flooding in at-risk areas.
• Natural defences - Planting vegetation like mangrove forests serves as a natural shield against flooding.