Indonesia is preparing warships as a last resort to evacuate children and others suffering from smoke inhalation from slash-and-burn fires, a minister said on Friday, as the country struggles to contain fires expected to continue for weeks. Southeast Asia has suffered for years from annual “haze” caused by forest and peat clearing across Indonesia, which has come under increasing political pressure to stop the problem, but so far to no avail. Fires this year have been helped by drier weather brought by the El Nino weather phenomenon and have pushed air pollution to hazardous levels across Southeast Asia, forcing schools to close and disrupting flights.