Bengaluru, May 18 (PTI) Two labourers died while many houses were flooded due to heavy downpour in the city, authorities said.<br> The Meteorological department on Wednesday forecast more rains in the city for the next 24 hours.<br> Two labourers -- Dev Vrat from Bihar and Ankit Kumar from Uttar Pradesh -- drowned after the water level inside a pipeline they were laying at Ullal here increased suddenly due to heavy rains on Tuesday evening, police said.<br> Another labourerer Trilok was lucky as he came out of the Cauvery water pipeline in time as the water level quickly rose.<br> Police have arrested the contractor for his alleged negligence while an inquiry is on to find out the role of the site engineer.<br> The heavy rain wreaked havoc in the city as water gushed into houses in many low-lying areas.<br> According to the Weather department, many areas received 50 mm to 150 mm rain in the last 24 hours.<br> Horamavu, Yelahanka, Vidyapeetha, Rajmahal, Nagapura, Sampangiramnagar, Vidyaranyapura, Banaswadi, Jakkur and Singasandra were among the worst-hit.<br> While Horamavu reported 155 mm rainfall, Yelahanka and Vidyapeetha received 129 mm and 127 mm rains, respectively, the department said.<br> Many trees were uprooted, Bengaluru civic agency said.<br> Scores of vehicles were submerged in the basements of some apartments in Horamavu, HSR Layout, Rajajinagar, Basaveshwaranagar and Neelasandra.<br> There was waterlogging in many parts of the city, which also witnessed traffic snarls due to the torrential rainfall.<br> Karnataka Chief Minister Basavaraj Bommai on Wednesday visited some of the rain-hit areas in the city. PTI GMS RS KH<br>HDA HDA