UV radiation reaches alarming levels in Jharkhand | ranchi | Hindustan Times
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UV radiation reaches alarming levels in Jharkhand

Jharkhand has already been reeling under heat wave conditions for the past couple of days with the maximum temperature hovering between 40 and 44 degrees Celsius across the state. Now, UV radiation is posing a serious risk to people.

ranchi Updated: Apr 01, 2017 09:51 IST
Sanjoy Dey
Commuters trying to protect themselves from the heat wave in Ranchi on Friday
Commuters trying to protect themselves from the heat wave in Ranchi on Friday(Diwakar Prasad/ Hindustan Times)

Think twice before going outdoors! The sun may not be kind between 11am and 2pm. In fact, it could be very cruel.

With soaring mercury, ultraviolet (UV) radiation has also reached an alarming level in Jharkhand cities, including Ranchi, once known as the summer capital of (then undivided) Bihar. The UV exposure for a certain time could cause skin burn, headache and eye inflammation.

Jharkhand has already been reeling under heat wave conditions for the past couple of days with the maximum temperature hovering between 40 and 44 degrees Celsius across the state. Now, UV radiation is posing a serious risk to people.

The UV index crossed “11” mark in Ranchi, Jamshedpur, Dhanbad, Hazaribag and Bokaro on Friday, which is usually recorded in the last week of April or May in Jharkhand.

“The index 11 is put under very high risk category by weather agencies, which means one could feel severe skin burns in 20-30 minutes in direct sun heat,” weather officials said.

The UV index is an international standard measurement of the strength of sunburn-producing ultraviolet radiation at a particular place and time.

“The UV index is calculated based on several factors like thickness of ozone layer over one city, cloud cover and elevation of one city. The UV index provides information about the level of UV rays or ultraviolet radiation that reaches the surface. If it exceeds the permissible limit, it definitely has some harm on the human body,” said B K Mandal, director, IMD, Ranchi centre.

Heat & Protection (HT Graphics)

Different weather agencies have placed Ranchi, which is sizzling at 39 degrees Celsius, in extreme category of UV index on Friday. Accuweather put Ranchi at UV index 12 while WeatherOnline at 10. Meteovista put the state capital at 11+ of UV index.

IMD divides UV index in five categories — low (0-2 UV Index), moderate (3-5), high (6-7), very high (8-10) and extreme (11+). People should take all kinds of precautions, including sunglasses, SPF 30+ sunscreen on face, cover body with long-sleeve shirts and trousers and avoid the sun from 11am to 4pm when the index is in the extreme category.

The Ranchi IMD centre, however, doesn’t certify the UV calculation of different agencies. “IMD does not measure UV index in Jharkhand. Therefore, we do not issue UV index,” Mandal said.

Nitish Priyadarshi, former professor at Ranchi University’s environment and water management department, said: “Risk begins when UV index crosses 10 mark. The situation is considered alarming when it touches 12. High UV radiation impacts skin within an hour. People could feel skin burn, eye inflammation and headache.”

Dolon Banerjee, 47, a Kokar resident, said, “Ranchi’s weather changed in the last one decade. We never experienced such scorching heat a few years back here. Now, temperature is touching 40 degrees Celsius in March itself.”