A heatwave is caused by a system of higher atmospheric pressure. In a high pressure system, air from upper levels of the atmosphere descends and rotates outward. As it comes down, it becomes compressed, which increases its temperature and dries it out.
Lyme disease: An inflammatory disease that is caused by the bacterium Borrelia burgdorferi, which is transmitted to humans by the deer tick. The first sign of Lyme disease is a red, circular, expanding rash, usually radiating from the tick bite, followed by flu-like symptoms and joint pains.
Lyme disease is an illness caused when humans are exposed to bacteria carried by certain kinds of ticks, principally deer ticks. It can have a variety of symptoms including flulike symptoms initially. Lyme disease rash may vary in diameter from about one to five inches. Lyme disease may occur when humans are exposed to the bacteria carried by deer ticks.