Final answer:
During the first rain of a season, roads can become slippery due to oil and grease mixing with water, and heavy rain can lead to flooding and pose safety risks. Extreme weather changes and storms can further complicate conditions, making it important to exercise caution.
Step-by-step explanation:
Be especially careful during the first rain of a season because roads can become slippery. Accumulated oil and grease on the road surfaces mix with water, reducing traction and increasing the likelihood of accidents. This is especially true if the roads have been dry for a long period and suddenly become wet from the first rains.
For instance, the first rain can make sidewalks and streets slick, leading to hazardous conditions for both pedestrians and drivers. If the soil becomes flooded due to heavy rain, the growth of plants can decrease, and swollen rivers can pose threats to safety. Therefore, caution is advised when engaging in outdoor activities during or immediately following the season's first downpour.
Additionally, extreme weather changes can be a result of atmospheric conditions such as a severe drop in atmospheric pressure leading to storms. All these factors make the first rain of the season a time to be vigilant and prepared for changing conditions and potential hazards.