. >> reporter: in the hills above carpenteria, luis contreras is on edge. >> highway 150 is way below, three quarters of a mile and just -- >> reporter: watching the fire rush toward his home and avocado groves as fire fighters try to slow the relentless spread. >> if a wind comes it is going to kill this in ten minutes. >> reporter: from the air a constant assault. choppers lining up to grab water, one after the other. dousing the flames. but the blaze just keeps coming. the fire fighters gather here, one of them in the truck has been injured. they are trying to treat him. this is where they are trying to make a stand, trying to save these homes. but the fire getting very close to one along the ridge there. >>> the work is dangerous and exhausting. crews who have been on seven days straight barely get a moment to rest. >> that's the nature of the work. we go from zero to 100. >> reporter: now more evacuations ordered in santa barbara county, residents told to run as gusty winds send embers flying. >> this fire is intensified every single day. >> reporter: thoer than 4,000 fire fighte