If you were considering grilling, setting off fireworks or even using a magnifying glass to light things (hopefully not ants) on fire, Douglas County's Emergency Management team is asking you to think again. Between 11 a.m. and 6 p.m. on Thursday the county is under a red-flag warning, the emergency management team said in a news release. This means that a combination of low humidity, high temperatures and windy conditions make it the perfect opportunity for fires to spread, the release said.