CRAWFORDVILLE, Florida — Emergency crews rushed Friday to rescue people trapped in flooded homes after Helene roared ashore as a powerful Category 4 hurricane in Florida, generating a massive storm surge and knocking out power to millions of customers in several states. At least six people were reported dead. The storm made landfall late Thursday in a sparsely populated region with maximum sustained winds of 140 mph in the rural Big Bend area, home to fishing villages and vacation hideaways where Florida’s Panhandle and peninsula meet. But the damage extended hundreds of miles to the north, with flooding as far away as North Carolina. One Georgia county was almost entirely without power. …One local news station showed a home that was overturned, and many communities established curfews. …DO NOT TRY TO TREAD FLOODWATERS YOURSELF,” the sheriff’s office warned in a Facebook post. Authorities said the water could contain live wires, sewage, sharp objects and other debris.