Heat and dry soils

Dry-soil conditions during the heatwaves mean that little solar radiation is being used to evaporate water, but most is used to warm up both the soil and the air. At night the warm air is preserved at higher levels in the atmosphere. This accumulated warm air is brought back in contact with the ground during the next day, and the Sun continues to warm up both the soil and the air. This causes temperatures to increase progressively day after day.