Delhi's air quality improves to 'moderate' after record rainfall - Environment Canada issues rainfall warning for Toronto and surrounding areas - Rain ends dry spell, improves air quality in Lahore - Incessant rain leads to waterlogging in parts of central, south, outer Delhi - Rainfall and wind warnings lifted for B.C. on Boxing Day - In pics: Tamil Nadu battles heavy rainfall as residents brave the storm - Tamil Nadu rain: Chennai records 25mm rainfall, subways remain open for commuters - Parque de la Bateria saved by intense rainfall - Monsoon may bring above normal rainfall: IMD