article_snippet.sent: The majority of heatwaves and almost a fifth of extreme rain storms can be blamed on human activity, a new study has warned.
article_snippet.sent: Researchers claim it is the rarest and most destructive events that seem to be the most responsive to human influence.
article_snippet.sent: Much of the most abnormal heat has been in the Pacific Ocean and places near it.
article_snippet.sent: Blunden blames the record heat on a combination of El Niño, a blob of record hot water in the Pacific Ocean and human-caused climate change. '
article_snippet.sent: Dr Fischer and his colleague Professor Reto Knutti, also based at the Swiss Federal Institute of Technology in Zurich, said taking a more global perspective made it easier to examine the role that human activity was having on such events.
article_snippet.sent: Dr Fischer and his colleague Professor Reto Knutti say Dr Fischer and his colleague Professor Reto Knutti research demonstrated a strong signal for human influence in the extreme weather that is having impacts around the world today.
article_snippet.sent: Around three quarters of heatwaves can now be attributed to human activity and it is likely to worsen as the climate warms .
highlights_snippet.sent: Scientists at the Swiss Federal Institute of Technology in Zurich found humans are to blame for the worst heatwaves and floods today .
  