Summer in Vietnam is really hot. The sun is shining brightly and the temperature can reach up to 38 degrees Celsius in many places. Because it's too hot, people often stay indoors and turn on the air conditioner. On the streets, there are too many people riding motorbikes, causing traffic jams. The sky is blue, but there are also sudden downpours. Although the weather is hot, summer is still the favorite season for students because of the summer vacation. The beaches are always crowded. However, one bad thing is environmental pollution because many people litter.