Which of the following statements is/are correct about new IMD norms?

1. Forecasts of heat and cold waves over a sub-division will be issued only if at least two stations in the sub-division are expected to experience such conditions

2. Heat wave is declared when temperatures are greater than 4.50C above usual temperatures for the region.

a. Only 1

b. Only 2

c. Both

d. None

ANSWER: Both

Explanation:

Forecasts of heat and cold waves over a sub-division will be issued only if at least two stations in the sub-division are expected to experience such conditions

Heat wave: Temperatures are greater than 4.50C above usual temperatures for the region.

Severe heat wave: Temperatures are greater than or equal to 470C.

Cold wave: Temperatures are less than 4.50C above usual temperatures for the region.

Severe cold wave: Temperatures are less than 20C