Key takeaways from the UN report on the climate crisis

By Brandon Miller, CNN

Updated 4:40 AM ET, Mon August 9, 2021

Downtown Houston is seen behind the flooded Buffalo Bayou a few days after Hurricane Harvey came ashore in August 2017. The Category 4 storm caused historic flooding. It set a record for the most rainfall from a tropical cyclone in the continental United States, with 51 inches of rain recorded in areas of Texas. An estimated 27 trillion gallons of water fell over Texas and Louisiana during a six-day period.
Photos: Hurricane Harvey slams Texas
Downtown Houston is seen behind the flooded Buffalo Bayou a few days after Hurricane Harvey came ashore in August 2017. The Category 4 storm caused historic flooding. It set a record for the most rainfall from a tropical cyclone in the continental United States, with 51 inches of rain recorded in areas of Texas. An estimated 27 trillion gallons of water fell over Texas and Louisiana during a six-day period.
Hide Caption
1 of 22
NASA astronaut Jack Fischer photographed Hurricane Harvey from the International Space Station.
Photos: Hurricane Harvey slams Texas
NASA astronaut Jack Fischer photographed Hurricane Harvey from the International Space Station.
Hide Caption
2 of 22
Steve Culver comforts his dog Otis in the hurricane aftermath. Harvey destroyed most of his home in Rockport while he and his wife were there.
Photos: Hurricane Harvey slams Texas
Steve Culver comforts his dog Otis in the hurricane aftermath. Harvey destroyed most of his home in Rockport while he and his wife were there.
Hide Caption
3 of 22
Houston police officer Daryl Hudeck carries Catherine Pham and her 13-month-old son, Aiden, after rescuing them from floodwaters.
Photos: Hurricane Harvey slams Texas
Houston police officer Daryl Hudeck carries Catherine Pham and her 13-month-old son, Aiden, after rescuing them from floodwaters.
Hide Caption
4 of 22
A damaged home is seen in the Key Allegro neighborhood of Rockport.
Photos: Hurricane Harvey slams Texas
A damaged home is seen in the Key Allegro neighborhood of Rockport.
Hide Caption
5 of 22
A car is submerged by floodwaters on a freeway near downtown Houston.
Photos: Hurricane Harvey slams Texas
A car is submerged by floodwaters on a freeway near downtown Houston.
Hide Caption
6 of 22
Melani Zurawski cries while inspecting her home in Port Aransas, Texas.
Photos: Hurricane Harvey slams Texas
Melani Zurawski cries while inspecting her home in Port Aransas, Texas.
Hide Caption
7 of 22
A graveyard is flooded in Pearland, Texas.
Photos: Hurricane Harvey slams Texas
A graveyard is flooded in Pearland, Texas.
Hide Caption
8 of 22
Soldiers with the National Guard patrol Rockport, looking for residents trapped in their homes.
Photos: Hurricane Harvey slams Texas
Soldiers with the National Guard patrol Rockport, looking for residents trapped in their homes.
Hide Caption
9 of 22
Evacuees are loaded onto a truck in Houston.
Photos: Hurricane Harvey slams Texas
Evacuees are loaded onto a truck in Houston.
Hide Caption
10 of 22
People push a stalled pickup through a flooded street in Houston.
Photos: Hurricane Harvey slams Texas
People push a stalled pickup through a flooded street in Houston.
Hide Caption
11 of 22
Rockport residents return to their destroyed home.
Photos: Hurricane Harvey slams Texas
Rockport residents return to their destroyed home.
Hide Caption
12 of 22
Rescue boats fill Tidwell Road in Houston as they help flood victims evacuate the area.
Photos: Hurricane Harvey slams Texas
Rescue boats fill Tidwell Road in Houston as they help flood victims evacuate the area.
Hide Caption
13 of 22
People wait to be rescued from their flooded home in Houston.
Photos: Hurricane Harvey slams Texas
People wait to be rescued from their flooded home in Houston.
Hide Caption
14 of 22
Volunteers in Dallas organize items donated for hurricane victims.
Photos: Hurricane Harvey slams Texas
Volunteers in Dallas organize items donated for hurricane victims.
Hide Caption
15 of 22
When Harvey slammed the Texas coast and flooded much of Houston, <a href="https://www.cnn.com/interactive/2017/08/us/hurricane-harvey-cnnphotos/" target="_blank">volunteers sprang into action.</a> Some came from as far away as the Florida Everglades, boats in tow, ready to rescue people trapped in their homes.
Photos: Hurricane Harvey slams Texas
When Harvey slammed the Texas coast and flooded much of Houston, volunteers sprang into action. Some came from as far away as the Florida Everglades, boats in tow, ready to rescue people trapped in their homes.
Hide Caption
16 of 22
Larry Koser Jr. and his son Matthew look for important papers and heirlooms inside a flooded home in Houston.