colony of rats on the surface and almost certainly numerous complaints to the control agency. In short, the uncontrolled populations of rats in sewers constitute a reservoir which extends into all parts of a city and is capable of establishing new infestations on the surface. The structural damage caused by sewer rats can be considerable. They are
The Saffir-Simpson scale measures the intensity of a hurricane. Wind speed is measured on a scale of 1-5 to give an estimate of potential property damage and flooding along the coast. The Categories are as follows: Category One Hurricane: Winds 74-95 mph.
Weather forecasters use a special tool called a barometer to measure air pressure. Barometers measure atmospheric pressure using mercury, water or air. Youâll usually hear forecasters give measurements in either inches of mercury or in millibars (mb).eather forecasters use a special tool called a barometer to measure air pressure. Barometers measure atmospheric pressure using mercury, water or air. Youâll usually hear forecasters give measurements in either inches of mercury or in millibars (mb).