A large wildfire in the North Caucasus republic of Karachayevo-Cherkessia has quickly spread over the past two days, prompting the evacuation of almost 250 people at a popular nature reserve, regional authoritiessaid Friday. Russian mediareported that the blaze erupted in the resort town of Dombay on Wednesday, temporarily trapping groups of tourists. Eyewitness videos showed a thick plume of smoke rising into the atmosphere over the picturesque landscape. Russia’s Emergency Situations Ministry said late Thursday that some of the stranded tourists had been evacuated. It later said 236 people i…