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With the capital set to bask in temperatures hotter than Ibiza at the weekend, firefighters have issued safety warnings, amidst concerns over a rise in fires.
Community Safety Group Manager Mark Hazelton said: "Warmer weather usually results in a rise in grass fires, which tend to be caused by people throwing cigarettes down.
"If you smoke, please dispose of your cigarette carefully to prevent grass fires, which can spread very quickly and cause a lot of damage."
Another cause of fires in the warmer months is barbecues. Mark Hazelton said: "Our other concern is barbecues, which always come out when the temperature rises.
"If you're having a barbecue, light it well away from anything that could catch fire, keep an eye on it and never use a barbecue indoors or on a balcony."
Our figures show that in London in the last five years:
The figures also showed a increase in the number of grass fires last year of almost 500 on the previous year. Fires caused by the sun's rays rose by one last year.