SAN DIEGO — With increasing summertime heat in the extended local weather forecast, two popular hiking areas in the San Diego-area backcountry will be off-limits to the public for the remainder of August, forestry officials announced Monday. Since the beginning of July, emergency services personnel have performed 11 medical rescues and 18 less urgent assists due to extreme heat in the two areas, forestry officials reported. The footpaths are considered “reverse-grade trails,” meaning the incline is experienced on the return portion of the hike, and both are challenging to traverse under any circumstances, forestry officials noted. “As temperatures decrease in the coming weeks, the forest leadership team will revisit the closures of these areas,” the Cleveland National Forest statement said. “If the hiking areas are found to be safe, the forest will reopen them to provide the public with access to healthy recreational opportunities (in) their national forest.”