Wildfires barrelled across the baking landscape of the western US and Canada, destroying homes, forcing thousands to flee and demolishing forests and farms. A combination of high temperatures and parched land has added to the difficulties of firefighters in California. On 19 July, in California, just one of the many fires that are currently forcing thousands to flee their homes doubled in size (48,000 acres, compared to 23,000 the day before). Over 2,000 firefighters have contained only 7% of the ‘Detwiler Fire’ which is approaching the town of Mariposa and communities in the foothills of the Sierra Nevada mountains. These blazes are part of 37 active large fires spread across 12 western states, according to the National Interagency Fire Centre. Meanwhile in Canada firefighters are contending with over 200 fires burning in British Columbia. See also and item 1 in Europe section.