<p>Wildfire forces evacuations and burns through mountains surrounding Villa de Leyva in the north-east </p><p>Colombian authorities declared a public calamity as a wildfire burned through mountains surrounding one of the country’s best-known colonial towns in the north-east, scorching large swaths of vegetation and forcing evacuations.</p><p>Nearly 20 active fires are burning across the South American country. Dry conditions have increased fire danger in Colombia as it braces for the effects of