1 / 4Delhi is likely to see the mercury touch the 46-degree Celsius mark today, the India Meteorological Department (IMD) said.2 / 4The Safdarjung observatory - Delhi's base station - had recorded a maximum temperature of 43.5 degrees Celsius on Thursday, the highest in April in 12 years.3 / 4The national capital had recorded a maximum temperature of 43.7 degrees Celsius on April 18, 2010. The all-time high temperature for the month is 45.6 degrees Celsius, which was recorded on April 29, 1941.4 / 4'The temperature at the Safdarjung observatory is likely to go up by 0.5 degree Celsius to 1 degree Celsius on Friday. It may even touch 46 degrees Celsius at some places,' senior scientist RK Jenamani said. Haryana, Delhi, western Uttar Pradesh and Madhya Pradesh are likely to log peak temperatures on Friday, he added. Rajasthan, Delhi, Punjab and Haryana may witness light rainfall and thunderstorm between May 2 and May 4. The maximum temperature will be between 36 degrees and 39 degrees Celsius, Mr Jenamani said. The IMD has issued an 'orange' alert, warning people of a severe heatwave in many parts of Delhi on Friday and Saturday. Chief Minister Arvind Kejriwal on Friday said his government is somehow handling the power supply situation in Delhi and called for quick, concrete steps to tackle the electricity crisis facing the country.