Dust Storms After Heatwaves: Why Cities in Central India Are Seeing More Sudden Evening Storms

Central Indian urban areas are experiencing an alarming trend with scorching days followed by sudden onsets of severe evening dust storms, strong winds, and thunderstorms. What used to feel like anomalies is now becoming a predictable part of the pre-monsoon season; therefore, extreme heat is substantially responsible for initiating this phenomenon.

Why Dust Storms Form After Heatwaves

1) Extreme Heat Supercharges the Atmosphere

When temperatures experience readings above 40°C for multiple days:

• The Earth becomes heated to a level of severe intensity.
• The surrounding hot air rises rapidly above ground level- creating an unstable atmosphere with potential for (listed above) storms to develop.

2) Strong Winds Lift Dry Dust Into the Air

During extreme heat the dry surfaces and loosely packed soil of central India are susceptible to damage due to dryness in relative proximity to heat disruption effects in high energy instances.

As previously described atmospheric conditions create instability the resulting wind gusts (or violent gusts) will negatively affect loose dust on land and result in rapid uplifts of dry dust creating massive walls of dust in advance of the thunderstorm event as previously described.

3) Moisture Meets Super-Heated Air

Moisture moving inland from nearby water bodies collides with hot air temperatures over the land, thus creating:

• Thunderstorm clouds
• Sudden burst of strong wind
• Severe duration (but very rapid in cancelling out)

Stronger wind gusts and more moisture directly correlated with higher levels of extreme temperatures coming into contact with moisture means increased storm potential in potency to cause damage in all forms to property, crops, people and communities throughout Central India.

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Longer Dry Periods Increase Dust Availability

Delays in rainfall and lengthy periods of dry; i.e. dry topsoil, dry vegetation and urban surfaces that produce dust when associated with higher wind speeds, make it easier for dust storms to occur.

Urban Heat Is Amplifying Local Storms

Cities absorb heat from concrete and asphalt pavements, automotive/industrial emissions and a decrease of green space, so that urban areas become “heat islands” that increase probabilities of night time storms developing; thus creating stronger storms to occur as atmospheric reactions occur to extreme and prolonged heat events during the summer months.

Final Words

Dust storms in central India continue to be a visible sign of the increasing volatility of summer temperatures, not just increases in summer temperatures alone. The relationship is being established whereby the combination of more intense periods of summertime heat and prolonged heat results in more intense atmospheric responses to the above.

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