New Delhi, July 18 -- An uncontrolled wildfire burned outside Madrid on Thursday, sending a giant cloud of smoke over the Spanish capital.

The fire broke out in the town of Mentrida in central Spain's Castile-La Mancha region about 50 kilometers (30 miles) southwest of the capital. Local authorities urged residents to stay home and close their windows.

Spanish authorities said the blaze had burned around 3,000 hectares (roughly 7,400 acres) by the late evening.

Firefighters deployed on the ground and in the air were working to extinguish the fire that began around 3 pm.

Wind blew the smoke over Madrid, where in the afternoon skies turned orange and thick with smoke.

Large parts of Spain are under heat and fire warnings, with temperat...