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 facts. 1  Lyme disease is a bacterial illness that is spread by tick bites. 2  Lyme disease can affect the skin, joints, heart, and the nervous system. 3  Lyme disease occurs in phases, with the early phase beginning at the site of the tick bite with an expanding ring of redness. Lyme disease is diagnosed based on the patient's clinical signs of illness and the detection of antibodies to the causative bacteria in the blood. Lyme disease is treated with antibiotics.