MUMBAI, March 4 -- After the pre-summer heatwave and high temperatures last week, the BMC on Monday undertook an emergency tree survey called 'Dead Dangerous Tree' to identify those trees on the city's roads that had weakened over time due to low moisture and concretisation around their base. About 1,000 trees are expected to be surveyed in the next eight days, with officials prioritising areas with ongoing road concretisation....