These problems are likely caused by urbanization.

air pollution
declining birth rate
forest overgrowth
housing shortages
overcrowding
volcanic eruptions
water pollution
water shortages

Air pollution, housing overgrowth, overcrowding, water pollution, and water shortage

While winters are rainy, summers are dry. regions with this climate are usually in the eastern part of the continents. they experience hot, humid summers and colder winters. precipitations have a regular distribution throughout the year, but hurricanes are common.