A special control room at the forces' headquarter New Delhi is monitoring the situation 24X7.
In the national capital, the maximum temperature was recorded at the season's highest at 44 degree Celsius.
Senior Janata Dal-United leader Nitish Kumar on Monday criticised the Bharatiya Janata Party and Prime Minister Narendra Modi for its false promises.
An FIR has also been lodged against boat operator in Sonpur Police Station.
The BJP plans to ride the upcoming Bihar assembly polls battle on four chariots that will helm the much hyped parivartan yatra.
The nationwide death toll on Friday rose to 2005 as the intense heat wave continued to sweep many parts of the country, with Palamau in Jharkhand recording the highest temperature of 47 degrees Celsius.
The killer heat wave brought the nationwide toll to 2,338 even as some places like Delhi got respite on Monday.
This classification of districts is to be followed by states and union terrotories till a week post May 3, when the second phase of lockdown will end, for containment operations.
The ripples from November 8 may be seen in next year's state budgets.
PM Narendra Modi accused Congress of "neglecting" Bihar's development since independence and recalled CM Nitish Kumar's past association with NDA.
'Consider this image of today's youth in Bihar -- armed with a bike, a smartphone and possibly some illegal arms too, imbibing incessant stream of images from the Internet and television.' 'Some of them would turn into gau bhakts, some would listen with interest the exploits of Salafism, dig deep into the Internet to come out with images which cry vociferously that their respective religions are in danger.'
As Cyclone Hudhud is closing in on the Andhra Pradesh coastline and is expected to make a landfall near Visakhapatnam by Sunday afternoon, about 1.11 lakh people in five coastal districts have been shifted to safer places.